Manual focusing lens is a kind of photographic lens whose definition can be adjusted manually. Its main parameters include focal length, aperture, focusing distance and focusing ring. Manual focusing
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Anyang Sancheng Metallurgical Materials Co., Ltd.: Welcome to buy discount silicon carbide, silicon slag, ferro silicon, manganese metal, calcium metal from professional manufacturers and suppliers in
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Zhejiang Yanjie Building Template Co., Ltd: Bamboo ware manufacturers from china - 24 yrs experience .find quality products & contact verified suppliers! Reduce costs with factory direct sourcing.
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Zhejiang Yanjie Building Template Co., Ltd: Bamboo ware manufacturers from china - 24 yrs experience .find quality products & contact verified suppliers! Reduce costs with factory direct sourcing.
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Zhejiang Yanjie Building Template Co., Ltd: Bamboo ware manufacturers from china - 24 yrs experience .find quality products & contact verified suppliers! Reduce costs with factory direct sourcing.
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CHUANGXING VALVE DIN standard gate valves are typical wedge gate valves designed and manufactured to German DIN standards covering materials of cast steel, stainless steel and alloy steel. The housing connection between body and bonnet can be classified as restrained or unrestrained flange seal, pressure self-sealing, and screwed seal. DIN 3352 gate valves can be manufactured either with rising stem(OS&Y) or non-rising stem. Rigid wedge and resilient wedge are available upon clients’ request.