The study of more than 700 teachers found that lifting children, working at child-height computers and desks as well as standing all day was contributing to their ills.
这项涉及700余名老师的研究发现，造成老师们背痛和关节痛的原因有以下这些：抱孩子、在儿童用的电脑桌上办公以及整天保持站立的状态。
The dirt mound both insulated the oven and placed it at a proper working height.
但在土冢都绝缘烤箱和放置在一个适当的工作的高度了。
A. Unique hydraulic circuit design for last support rise result in stable working height. The last can be fixed at the same position throughout operation.
楦头支架上升油路独特设计，工作高度稳定，动作平衡。轻易操控，可在结帮过程中将楦头完全掌握在设定装置。
The jacking frame is hydraulically controlled to enable the injector head to be located at a safe and secure working height.
举重架由液压控制，使得注入头能够置于一个安全可靠的工作高度。
At the same time, the performance and the working quality are also improved by changing the machine's walking speed rate or lowering the machine's height.
同时，通过降低机器高度，改变机器行走速比，能提高抛秧机工作性能和作业质量。
At the same time, the performance and the working quality are also improved by changing the machine's walking speed rate or lowering the machine's height.
同时，通过降低机器高度，改变机器行走速比，能提高抛秧机工作性能和作业质量。
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