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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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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Jining Shengfan New Material Co., Ltd: Find professional carbon black, medical intermediates, loxo-101, organic compounds, acetylene black suppliers in China here. With abundant experience, we warmly
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GNEE is one of the most professional en pressure vessel plate manufacturers in China. We warmly welcome you to wholesale high quality en pressure vessel plate at competitive price from our factory.
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Welcome to power transmissions.com Hangzhou Chinabase Machinery Co., Ltd is a group of factories, give customer one stop solution of power transmission and industrial ...