pressure hold meaning in English

密封舱
压手支点

The film is anchored to the ground, and the pressure holds it up very cheaply .
此薄膜锚固在地面上，花很小的费用就可用压力将它撑起。
Each oil cylinder includes a pressure holding and limiting device , an oil supply device and oil pipes . the complex equipment is very difficult to control , besides , the reliability should be taken into account
但是控制如此之多的油缸及其保压、限压、补油装置，是很繁琐复杂的，该系统的安全可靠性受到人们的关注。
The pore air pressure gradually goes up with the developing of axial strain in the process of the dynamic torsional shear test of loess , but the pore water pressure hold the line or goes up a little in the last . the stress - strain dynamic constitutive relationship of intact loess and man - made loess show the hyperbolic model . there are some remarkable differences of strength and strain between unsaturated loess and saturated loess
研究结果表明：非饱和黄土在动力扭剪试验过程中，随着轴向变形的发展，孔隙气压力逐渐上升，而孔隙水压力则基本保持不变或后期略有升高；原状黄土和重塑黄土的应力应变本构关系呈双曲线型；非饱和黄土和饱和黄土的强度及变形特性存在明显差异；进而分析了含水量、固结应力和固结应力比对黄土动力特性的影响本文最后对非饱和土的有效应力计算公式进行了讨论。