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1?3?�?(mm)
DN15~500
15~500
DN15~300
DN15~500
DN50~1200
DN200~1800
1?3??1á|(MPa)
PN0.6~1.6
PN0.6~1.6
PN0.6~2.5
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PN0.6~4.0
PN0.6~1.6
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GB/T 12221-1989
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JB/T 82.1-94??GB/T9113.1-2000
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GB/T 13927-1992