Now generally used PTEE, EPDM and other material for the valve seat, so bubbles leakproofness good.现一般均使用PTEE 、 EPDM等材料,为阀座, 因此,气泡密封性佳.Especially in automobile industry, the leakproofness of cylinder influences the perfo...
To hold on stubbornly, as to a position; entrench oneself.固执地坚持立场; 稳固自己的地位.A new year looks sure entrench old resentments.新的一年看起来会让不满持续下去.They entrench themselves behind undeniable facts.他们在无可否认的事实后面固守著自己....
The landlord refused to serve him because he considered him too drunk.酒吧老板觉得他已经喝多了，拒绝再给他添酒。He was in an argument with his landlord downstairs.他与楼下的房东发生了争执。Larry's landlord threatened not to renew his lease.拉里的房东威胁说不...
Brian was whirling like a dervish, slapping at the mosquitoes and moaning.布赖恩如同旋转舞蹈的托钵僧一样转来转去，一边拍打着蚊子一边抱怨不停。He threw himself around the stage like a whirling dervish.他在台上转圈，如同跳旋转舞蹈的托钵僧一样。First of all, you cut costs like ...