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管道成型焊接件技术条件
Specification for pipeline formed welding parts
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电加热锅炉技术条件
Specification for electric boilers
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方形铸铁省煤器技术条件
Specification for square cast-iron economizer
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恒力碟簧支吊架
Constant support disc spring hangers
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锅炉用抛煤机技术条件
Specification of spreader stokers for boilers
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工业锅炉运行规程
Operating code for industrial boilers
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