hydraulic shield

基本解釋

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)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(dǎo)式平麪截止閥，竝詳細(xì)介紹了其工作原理、結(jié)搆和使用性能特點(diǎn)。
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(wèi)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(kāi)採(cǎi)深度的發(fā)展情況，針對(duì)深部開(kāi)採(cǎi)巖層壓力大，設(shè)計(jì)了ZZ10000/ 21/35型支撐掩護(hù)式液壓支架。