一个人看的WWW片免费高清中文,国产精品免费视频,老太bbwwbbww高潮,国语自产少妇精品视频

請選擇語言版本:中文版 | English | ??? ??
首頁/
產品中心

Model BIA mechanical seal

產品簡介:
Double ended / unbalanced / arbitrary direction / rubber bellows

Operating parameters:
The pressure in the seal cavity: less than 0.6Mpa, the seal cavity temperature: -20 ~150 DEG C, line speed: less than 10m/Sec and the sealed medium: water, oil, weak corrosive medium, cheap, widely used. The dynamic and static ring material: resin (metal) graphite, silicon carbide, alumina, hard alloy.