to evaluate the time effect on mechanical properties of orthodontic arch wires.

目的评价临床使用时间的长短对弓丝机械性能的影响。

the specific material selected for a particular tool is normally determined by the mechanical properties necessary for proper operation of the tool.

为某一工具选择特有的材料，通常由该工具在正确的操作下所需的机械性质决定。

bricks show no loss of useful mechanical properties even when 20-30% of their content is slag. nor do they leak.

即便当渣含量达20%-30%时，制成砖并未显示出有用力学性能的损失，同样也没有产生裂纹。

since the material was first created in 2004, its unique electronic and mechanical properties have amazed researchers who say that it could be used in a host of device applications.

自2004年这种材料发现以来，它独特的电学和机械性能令研究人员震惊，他们认为石墨烯可用于多种器件的制造。

lead researcher ali reza ranjbartoreh said: 'no one else has used a similar production and heat testing method to find and carry out such exceptional mechanical properties for graphene paper.

主要研究人员alirezaranjbartoreh说：“没有人使用一个类似的生产和热试验方法查找并发现石墨纸张如此特殊的机械性能。

the exceptional mechanical properties of synthesised gp render it a promising material for commercial and engineering applications.

这种合成石墨纸的特殊机械性能使它成为在商业和机械应用方面一种有前景的材料。

「the mechanical properties of titanium foams made this way closely approach those of the human bone,」 said quadbeck.

负责研究的科学家表示：“这种钛发泡材料的机械性能与人体骨骼非常类似。

these involve changes to the lithium chemistry of batteries, their mechanical properties and the electronics that control them.

这将改变电池的化学成分、机械特性以及控制电路。

the phb homopolymer is a stiff and rather brittle polymer of high crystallinity, whose mechanical properties are not unlike those of polystyrene, though it is less brittle.

在phb的均聚物是一种高结晶度，其不同于那些不聚苯乙烯力学性能，比较脆硬聚合物，虽然它是那么脆弱。

bricks show no loss of useful mechanical properties even when 20-30% of their content is slag.

砖块显示，这对其有效的机械性能毫无损耗。

improving mechanical properties of paper and board manufactured from recycled paper is an improtant subject today.

如今，改善废纸生产的纸和纸板的机械性能是一个热门的话题。

the mechanical properties and failure patterns of the clad material are investigated with the method of experiment and theory.

采用理论与试验相结合的方法研究了这类材料的力学性能与主要失效方式。

mechanical properties of the weld metal mechanical properties of the weld metal are not part of the classification.

焊缝金属的机械性能焊缝金属的机械性能不是分类中的一部分。

improving mechanical properties of paper and board manufactured from recycled paper is an important subject today.

改善回收纸张制造的纸张和纸板机械性能是当今的一个重要课题。

overheating of components can change the original steel temper and mechanical properties of the affected area.

部件过热会改变受影响区域内钢材的初始韧度和机械性能。

the mechanical properties of thermoplastics, while substantially lower than those of metals, can be enhanced for some applications through the addition of glass fiber reinforcement.

就本质而言，热塑性塑料的机械性能低于金属，但可以通过加入玻璃纤维强化予以增强来适应某些运用。

objective. to investigate the ability of two collagen crosslinking agents to restore mechanical properties to lumbar joints destabilized by surgical decompression procedures.

目的：旨在研究两个胶原蛋白交联剂对于手术后椎体关节失稳恢复机械性能的能力。