drillingtechnique 中文意思是什麼
-
This machine adopts two species of drillingtechnique of direct and reverse circulation, the efficiency enhances observably in the process of ovum, gravel and rock layer construction
該機可採用正反循環兩種鉆進工藝，在卵、礫、巖層施工中，效率顯著提高。
分享友人