With the aging time increasing, degradation effect became more superior, mechanical property and crosslink density decreased, while Compression permanent distortion increased.
但继续老化后，主链断裂逐渐占据主导地位，发生了氧化裂解，使橡胶力学性能和交联密度下降，压缩永久变形率增加；
The mechanical factors for the property of welding joint are welding defects, discontinuity of joint shape, welding residual stress and welding distortion.
通常，影响焊接接头性能的力学因素有焊接缺陷、接头形状的不连续性、焊接残余应力以及焊接变形。
Central axle distortion and power transformation graph find wide USES in design of various mechanical components and products.
在机械零部件和各类制品中，中心轴变化图形和乘幂变换图形的应用十分广泛。
应用推荐