- specification for steel pipe flanges
- types and parameters for steel pipe flanges
- 钢: sharpen; strop; whet
- 制管: tubulation
- 法兰: flange
- 钢制管法兰类型: types for steel pipe flanges gb/t 1-pn6mpa(16bar)
- 平面钢制管法兰盖: steel pipe blank flanges with flat face for pn 6mpa
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