Home product purchase and maintenance tips

Carefully choose a good mattress

1. Modern people have a fast pace of life, great stress, and high-quality sleep is very important. At this time, a mattress that makes you sleep well is essential. When purchasing a mattress, first look at the stitches of the computer thread stitching. The fabric of the soft mattress should be quilted tightly, without obvious wrinkles or floating lines. The current standard stipulates that the single-pin jumper is not allowed to exceed 8 places. It is not allowed to have a broken line. It is not allowed to jump double-needle. The seam edge and the four-corner arc should be evenly symmetrical. Do not allow the burrs to be exposed. Otherwise, the quality of the mattress is not good enough. Affect the life of the mattress.

2. Don't worry about the fabric pattern, pay attention to the fabric itself. Most of the mattress fabrics currently on the market are woven cotton fabrics and chemical fiber fabrics. In addition to more sturdy and hygienic, some imported woven cotton fabrics are also treated with antibacterial treatment, which is more in line with the requirements of healthy sleep.

3. There are 3 basic types of mattresses - foam, filled and spring. High quality foam mattresses should be at least 11 cm thick and should not be purchased if the thickness is not sufficient. The ability of a filled mattress to withstand depends on its elasticity and the quality of the filler, plus whether it has a resilient base support. The quality of a spring mattress depends on the number of springs, the more the better. The number of springs of spring mattresses is generally about 500, at least 288, and the springs of some mattresses can be as many as 1000, the more the better.

4. A mattress that is too soft, although it is comfortable to sleep, it is easy to fall, which makes it difficult to turn over; and a mattress that is too hard can not properly support various parts of the body, causing more serious chronic damage to the spine. To choose this way:

A. Lie down, put your hands in the three obvious bends between the neck, waist and hips to the thighs to see if there are any gaps; then turn to one side and try the body in the same way. There is no gap between the protruding part of the curve and the mattress; if not, it proves that the mattress and the natural curve of the neck, back, waist, hip and leg during sleep are in close contact with each other. Such a mattress can be said to be soft. Hard moderate.

B. Press firmly on the upper part of the mattress, the internal spring must not have frictional sound, the spring wire should not puncture the mat surface, the mat surface should be even and even, listen to the sound inside the spring, see if the mattress collapses a lot, there are more than The phenomenon indicates that the quality of the spring is poor, which also affects the service life of the mattress.

C. Erect the mattress of the selected color style to see if it can stand firm, and the frame of the mattress is relatively hard.

4. Consider the size of the mattress. When purchasing a mattress, add 20 cm to the optimal size, so that there is room for the head and hands and feet to stretch.

Let's talk about the use and maintenance of furniture:

Mastering the correct use and maintenance knowledge during the use of the furniture not only makes the furniture look fresh and new, but also extends the life of the furniture.

1, the use of environmental requirements

All kinds of furniture, especially wood furniture, require a certain temperature and relative humidity in the room during use. Newly purchased furniture, indoors should also maintain a certain degree of ventilation. In addition, the furniture should be protected from direct sunlight to avoid discoloration or cracking of the furniture surface. If indoor air conditioning is used, the indoor relative humidity should be kept at around 60%. If possible, plant some flowers or ornamental fish indoors to increase the humidity in the room.

2, regular maintenance

The surface coating of wood furniture not only plays a role in decorating and beautifying the surface of the furniture, but more importantly, it protects the surface of the furniture, so the surface of the furniture should be cleaned regularly. Usually for three months, first use a soft towel to wipe off the dust and dirt on the furniture surface. After the furniture surface is slightly dry, gently wipe the surface of the furniture with furniture wax or liquid wax for glazing. For furniture hardware, especially the movable hardware accessories such as door hinges and drawer guides, lubricating oil (such as sewing machine oil) should be applied regularly to reduce the friction sound of the hardware and prolong the service life.

Sofa maintenance is mainly fabric. Cloth sofas should be cleaned regularly. Leather sofas should be cleaned regularly to keep the leather shiny and hygienic and prevent mildew. Spring soft mattress, usually flipped every 3 months or turned back and forth once to keep the mattress surface evenly stressed, keep the surface flat and extend the service life.

Description for RG59 with Power Cable:

Mainly used for the distribution and access of electronic communication equipment, RF transmitter

unit of communication system, building cabling and CATV; the most striking features are broadband

and high speed; currently, also widely used in the multimedia transmission field; conforms to RG59.

Features for RG59 with Power Cable :

 

Specificaitons

Physical dimensions

 

 

component

Standard-shield

Tri-shield

Quad-shield

inchs

mm

inchs

mm

inchs

mm

Nominal center conductor diameter

0.032

0.81

0.032

0.81

0.032

0.81

Nominal diameter over dielectric

0.144

3.66

0.144

3.66

0.14

3.66

Nominal diameter over first shield

0.151

3.84

0.151

3.84

0.151

3.84

Nominal diameter over jacket

0.24

6.10

0.24

6.10

0.265

6.73

Nominal jacket wall thickness

0.03

0.76

0.032

0.81

0.034

0.86

Nominal diameter of

steel messenger

0.051(single)

1.3

0.051(single)

1.3

0.051(single)

1.3

0.072(dual)

1.83

0.072(dual)

1.83

0.072(dual)

1.83

 

 

 

 

 

 

 

 

 

 

 

 

 

Electrial Characteristics

Nominal impedance

75ohms

Nominal Velocity of propagation

85%

 

 

 

Attenuation(20°C)

Frequency(MHz)

Maximum(dB/100ft)

Maximum(dB/100m)

55

2.05

6.73

211

3.80

12.47

350

4.80

15.75

450

5.40

17.72

550

5.95

19.52

750

6.97

22.87

865

7.52

24.67

1000

8.12

26.64

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Coaxial Cable

Coaxial Cable,CCTV Camera Coaxial Cable,RF Coaxial Cable,RG6 Coaxial Cable

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