詞語：hollow-rod
hollow-rod的意思
hollow-rod 空心桿;空心[鑽]桿;hollow-rod churn drill 空心桿沖鑽;
hollow-rod的參考例句
1.The hollow sucker rod used in surface-driven screw pump wells has the problem of breaking and thread-off. 針對地面驅動螺桿泵空心抽油桿采油技術目前存在的空心抽油桿斷脫問題，研製了新型防脫空心抽油桿。
2.This unit consists of electric power unit which changes from triphase into single-phase, heating cable, hollow rod and accessories. 這套裝置由三相變單相供電裝置、加熱電纜、空心抽油桿和附件構成。
3.A calculation example is given, which further illustrates the advantages of the hydraulic-feedback-type hollow sucker rod pumping technology. 計算示例進一步說明了液力反饋型空心桿采油工藝的優越性。