常見(jiàn)例句雙語(yǔ)例句The valve is installed underground pipelines. Its drive type adopts wrench ; Through way flow passage and low flow resistance;安裝在地下管路，傳動(dòng)方式采用扳手，直通式管道，流阻??；Full diameter structure of ball valve ensures the conformity of inside diameter of passage and pipeline, with the fluid resistance minimized and easy for cleaning pipeline.全通徑結(jié)構(gòu)保證通道內(nèi)徑與管線內(nèi)徑一致，不但使流體阻力最小，也便于清潔通道。www.ningning.com.cn 返回 valve passage resistance