Based on a perfect offset press, a kind of on off pressure mechanism through moving upper and lower blankets is designed.
从双面胶印机的特点出发，设计出一种由上下橡皮滚筒完成动作的离合压机构。
The conclusion shows that DJM has more influence on the pore water pressure of the upper soil, and PVD and DJM both have more influence on the lower soil.
研究认为粉喷桩的存在对地基加固区土体的孔压值影响较大，而在地基下卧层有无粉喷桩或排水板对土体孔压影响都很大。
Usually with the ball in the upper and lower shaft with bearings, operating torque, suitable for high pressure and large diameter valves.
通常在与球体的上、下轴上装有轴承，操作扭距小，适用于高压和大口径的阀门。
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