The traditional method make work density strength descended, recovering the work strength increase, making to invite the safety produce.
传统的支护方式使工作面支护密度强度下降,回收工作强度增加,制约了安全生产。
Making use of physical or chemical vapor deposition to accumulate to plate the film mutually and reinforces the surface of work strength.
利用物理或者化学气相沉积镀膜,增加工件表面强度。
This program can make designing calculation, selecting components and drawing into one and shorten its designing period, lighten work strength.
该程序实现了设计计算、部件选型和绘制图纸的一体化,并可缩短设计周期,减轻工作强度。
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