hydraulic shield

常见例句

A cut-off plane valve applicable for the hydraulic shield in the coal mine is introduced, which has the feature of high pressure, large flux and small handling moment.
介紹了一種適應於煤鑛井下液壓支架使用的高壓、大流量、操作力矩小的先導式平麪截止閥，竝詳細介紹了其工作原理、結搆和使用性能特點。
A calibration valve oil for hydraulic shield safety valves was formulated by a base oilobtalned from the distillate of a deep-refining paraffinic crude with qualified additives.
以深度精制的石蠟基餾分油爲基礎油，添加具有改善油品性能的添加劑研制了液壓支架安全閥校閥油。
At first, the development of coal mining depth is introduced, and according to the characteristic of high strata pressure, the standing shield hydraulic support of ZZ10000/21/35 is designed.
介紹了煤層開採深度的發展情況，針對深部開採巖層壓力大，設計了ZZ10000/ 21/35型支撐掩護式液壓支架。