10 copper, brass pipe installation quality management
Time: 2017-12-22
Copper, brass pipe installation quality management standards: "Construction Quality Acceptance Unified Standards" GB50300-2001 "building water supply and drainage and construction quality acceptance norms" GB50242-2002 1, the scope of the process standard applies to the working pressure of 4MPa The following is a copper pipe with a temperature of 250 to 196
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