hydraulic shield

基本解释

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.
介绍了一种适应于煤矿井下液压支架使用的高压、大流量、操作力矩小的先导式平面截止阀，并详细介绍了其工作原理、结构和使用性能特点。
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.
以深度精制的石蜡基馏分油为基础油，添加具有改善油品性能的添加剂研制了液压支架安全阀校阀油。
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.
介绍了煤层开采深度的发展情况，针对深部开采岩层压力大，设计了ZZ10000/ 21/35型支撑掩护式液压支架。