低压流体输送用焊接钢管
低压流体输送用焊接钢管
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GB/T3091-1993低压流体输送用镀锌焊接钢管
Galvanized welded steel pipe for low pressure service
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络合滴定法测定低压流体输送用镀锌焊接钢管镀锌层重量
Determination of the mass of zinc plating layer of welded steel pipe by chelatometric titration
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对GB/T3091低压流体输送用镀锌焊接钢管标准的几点看法和建议
Views and suggestions on the standard gb / t 3091 low pressure fluid transportable zinc-coating welded tubes