Xiamen Gelashi Optical Co., Ltd: We're professional sunglasses, optical frames, reading glasses, kids eyewear, sports sunglasses manufacturers and suppliers in China. We warmly welcome you to
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Good thermal insulation: due to the low thermal conductivity of butt welding flange material, the thermal conductivity of 20 ℃ is 0.21-0.24w/mk, which is much smaller than that of steel pipe and
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Kocway Elevator (Suzhou) Co., Ltd: We are the China's leading company for elevator and escalator manufacturing, the China's largest portfolio. We can be found in many recognizable buildings as well as
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Kocway Elevator (Suzhou) Co., Ltd: We are the China's leading company for elevator and escalator manufacturing, the China's largest portfolio. We can be found in many recognizable buildings as well as
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The alumina used in the catalytic agent, we usually call it Activated alumina. It is a kind of porous, highly dispersed solid material, with large superficial area.
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