The effect of back pressure on the weight precision in injection molding was investigated via experiments of injecting to air.

通过对空注射方式对影响精密制品质量重复精度之一的背压进行实验和理论研究。

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Such as operation program, selection of earth pressure, wall-back grouting, rectification of shield machine, which are used to reduce the effect of construction on environment, are analyzed in detail.

详细分析了掘进模式、土压力选择、壁后注浆、盾构纠偏等施工控制手段，用来减小盾构施工对周边环境的影响。

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It is a simple and effective way to analyze soil mechanical properties by means of earth pressure model considering time-displacement effect and back-analysis based on site test data.

采用考虑时间和位移效应的土压力模型和基于现场实测资料的反分析方法来分析土体受力特性，是简单且行之有效的。

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This is when the sudden pressure of demand on supply cannot be met, and demand must, in effect, be cut back by higher prices.

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