When heated, water can chang into vapor.
当加热以后,水会变成水蒸气。
Yongnian County, Hebei Chang into standard parts shop store warmly welcome all friends to visit, study, business negotiations.
永年县河北铺昌成标准件门市热诚欢迎各界朋友前来参观、考察、洽谈业务。
The radial stress is press stress in the joint axis and is gradually from press stress chang into pull stress in the area further away from the axis.
接头内径向残余应力在轴心处为压应力,随着远离轴心逐渐由拉应力变为压应力,在接头边缘区域为拉应力。
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