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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Qinhuangdao Aotong Trading Co., Ltd.: Welcome to wholesale low alloy steel plate, pipe line plate, pressure vessel plate, wear plate, high strength plate for sale here from professional manufacturers
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Qinhuangdao Aotong Trading Co., Ltd.: Welcome to wholesale low alloy steel plate, pipe line plate, pressure vessel plate, wear plate, high strength plate for sale here from professional manufacturers
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A diamond cutting disc is a type of saw blade that is used to cut hard materials such as granite, marble, concrete, and asphalt. The blade is made of synthetic diamonds that are bonded to a metal
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Zhejiang Koleda Machinery Co.,Ltd.: We can provide piston air compressor, screw air compressor, diesel portable air compressor, pneumatic rock drill, DTH drill rig, fully hydraulic drill rig, top
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