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    ͨʹõĺͿѡʹõı־Ŀ硶 1ʾֳֶߴ㹻ӦָʾŹرշļͷ򸽼“”

    1 ͨ÷ŵı־Ŀ GB/T12220-1989
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    ͨ÷ŵľ־涨£

    1. 1е 1-4 DZʹõı־ DN≥50mm ķӦڷ DN<50mm ķڷϻDZɲƷ߹涨
    2. 1е 5 6 ֻеij෧ű׼д˹涨ʱDZʹõı־Ӧֱڷ弰
    3. ෧ű׼û涨򡶱 1 7-19 ǰҪѡʹõı־Ҫʱɱڷ
    4. ڼѹڷϵı־ 1Ĺ涨ӦУ  ý ѹ
    5. ˮı־ 2Ĺ涨־ɱڷҲɱڱ
    6. ȫı־ 3Ĺ涨
    2ˮı־GB/T12249-1989
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    ĵַhttp://www.movieor.com/tech/ty/99.html


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