single plug cement head 单塞水泥头
Cement head and cementing plug 固井水泥头及常规固井胶塞
cement casing head 水泥头 ; 注水泥套管头
low head cement 低热水泥
double plug cement head 双级注水泥器
low head of hydratation cement 低热水泥
cement t casing head 注水泥套管头
multi-head stirring cement pile 多头搅拌水泥桩
应用推荐