hydraulic shield

常見例句

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(yīng)于煤礦井下液壓支架使用的高壓、大流量、操作力矩小的先導(dǎo)式平面截止閥，并詳細介紹了其工作原理、結(jié)構(gòu)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為基礎(chǔ)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.
介紹了煤層開采深度的發(fā)展情況，針對深部開采巖層壓力大，設(shè)計了ZZ10000/ 21/35型支撐掩護式液壓支架。