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。
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