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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Beijing Mufeng Technology Co., Ltd: We are specialist for steel casting parts used in trailer industrial, engineering vehicle and engineering industrial. Our company has the manufacturing factory
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Shandong Native Produce Furniture Co., Ltd: We're known as one of the most professional table, chair, bed, cabinet, stool manufacturers and suppliers in China. If you're going to buy discount
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NEWTECH is one of the most professional gas air compressor manufacturers and suppliers in China, featured by cheap products and good service. Please feel free to wholesale custom made gas air
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Ductile Cast Iron Gate Valve, also known as Ductile Cast Iron Sluice Valve made of Ductile Cast Iron is a valve that opens by lifting a barrier (gate) out of the path of the fluid. Ductile Cast Iron
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