国产在线91_被夫上司持续侵犯7天_裸模棚拍人体欣赏_亚洲欧美18v中文字幕高清

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paimen
Product introduction

Product standard:.05 Q/TFB27M

Nominal pressure: PN0.251.6MPa

Nominal diameter: DN350 - 2000 mm

Seal leakage: GB/T13927 D level

Gate valve is a kind of valve products, by the media pressure to open the door, by the door to close the seal, mainly used in sewage, can also be used for other hydraulic systems.


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