The product according to the European DIN industry standards, use of the support material alloy, nickel plated product core part, using a cylindrical steel roller bearings, <br>so as to ensure stability of product quality (no neutral phenomenon), reduce wear and enhance the durability of the product degree. <br>This product is 3.5-4 times the life of ordinary domestic structure. <br>Rotary push switch can achieve the effect of FIG. 2, by adjusting the screw through the * best results, a product used in three installation effect.
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