The ball screw can be pre pressed, because the pre pressure can make the axial gap reach negative value, and then get higher rigidity.
滚珠丝杠可以加预压，由于预压力可使轴向间隙达到负值，进而得到较高的刚性。
Furthermore, the effect from the negative pore water pressure on the uplift bearing capacity is investigated in the light of the result of the prototype test, of which the value is determined as well.
同时根据原型试验结果，研究了负孔隙水压力对抗拔承载力的影响，确定了其值的大小。
Recommends the proper value of pressure difference between negative pressure wards and adjacent clean zones.
给出了负压病房和相邻洁净区域压差的推荐值。
Objective to evaluate the value of the negative pressure drainage in parotidectomy and analyze the clinical factors correlated with salivary fistula post-parotidectomy.
目的探讨负压引流在腮腺手术中的应用价值，分析与腮腺术后涎瘘相关的临床因素。
Pressure characteristic function curve with significant characters is one kind of curve with oscillation shape and its value between positive and negative.
压力导数的子波变换曲线具有明显的形态特征，它是一种正负相间、具有振荡形式的曲线。
The device with a gas much using only needs to import compressed air and exports compressed air and negative pressure with different pressing value through the conversion and tune of the part.
一气多用装置，只需要压缩空气的输入，通过部件的转换和调谐，便可以得到不同压值的压缩空气输出和负压输出。
Objective To discuss the clinical value and existing problems of the fixation technology of negative pressure vacuum bag in tumor precise radiotherapy.
目的：探讨负压真空气垫固定技术在肿瘤精确放疗中的临床应用价值及存在的问题。
The experiment showed that in the melon slices there were some points where the sound pressure attenuation coefficient were negative value or zero.
实验表明额隆内有若干点声衰减为负值及零值、意味着声波沿这些点传输时、声压非但不减小反而增大了。
Statistical analysis shows, calibration error of CAWS pressure sensor mostly deviated negative value region, and unqualified sensor conforms negative value ultra error.
考察了自动气象站气压传感器校准误差的年变化量。
Statistical analysis shows, calibration error of CAWS pressure sensor mostly deviated negative value region, and unqualified sensor conforms negative value ultra error.
考察了自动气象站气压传感器校准误差的年变化量。
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