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Current national standards
gb/t10752-1995 Marine steel pipe to welding head
Flexible interface Cast iron pipes and fittings for gb/t12772-1999 drainage
GB/T 8803-2001 test method for hot oven of rigid polyvinyl chloride (PVC-u), chlorinated polyvinyl chloride (pvc-c), acrylonitrile-butadiene-Styrene ternary copolymer (ABS) and acrylonitrile-styrene-acrylate ternary copolymer (ASA) tube
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