NEN 1092-1984 Safety requirements for polyethylene (PE) gas pipe lines operating at working pressures exceeding 1 bar《工作压力在1巴以上的聚乙烯（PE）输气管道的安全要求》.pdf

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CBM 1022-1981 船用法兰 许用温度及工作压力（草案）.pdf

HB 4-123-1983 工作压力为15kgcm'2的装有同外锥管嘴的4;5组棉线编织软管.pdf

HB 4-124-1983 工作压力为15kgcm'2的装有内锥管嘴的4;5组棉线编织软管.pdf

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HB 4-132-1983 工作压力为30~120kgcm,2的装有外锥管嘴的4组棉线编织软管.pdf

HB 4-125-1983 工作压力为15kgcm'2的装有外锥管嘴的4;5组棉线编织软管.pdf

HB 4-127-1983 工作压力为15kgcm'2的装有内外锥管嘴的2组棉线编织软管.pdf

HB 4-128-1983 工作压力的15kgcm'2的装有内锥管嘴的2组棉线绵织软管.pdf

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