无码丰满熟妇juliaann与黑人_欧美精品老牛影院_寂寞人妻瑜伽被教练日_丰满少妇一级毛片在_热99精品这有里视频_超清aⅤ在线播放不卡无码_欧美 中文字幕 自拍_大香伊蕉国产最新视频_窄裙大腿教师波多野结衣_免费人成在线观看播放黄不卡

Buried all-welded ball valve standard features:

1): Path: DN15-1000

2): Pressure: PN 16-40

3): Working temperature: -29 ° C + 200 ° C

4): Buried all-welded ball valve adapts to medium: water, oil, natural gas

5): Buried all-welded ball valve operation mode: handle, gear (vertical / horizontal), electric