短語詞組短語bottom of head 下頭bottom -head rivet 圓頭鉚釘;翻譯bottom knife head 下刀片滑塊Cone bottom elliptical head tank 立式橢封錐底儲(chǔ)罐spherically dished bottom head 半球形底封頭RPV bottom head 反應(yīng)堆壓力容器底封頭bottom head cap screw 美不雅的半圓頭螺絲bottom head centre disc 底封頭中心碟形盤cylinder bottom head 缸底蓋;汽缸底蓋 返回 bottom head