stretch and squeeze

Mainly introduced the manufacture technology of the drum shape extruding core which determined the inner hole size of tube section material in the aluminum alloy extruding-drawing die.

主要介绍了在铝合金挤压拉伸模具中,决定管型材内孔尺寸用的鼓形挤压拉伸芯头的加工方法、加工要点和加工过程。

Through asphalt ductility test and mixture tensile properties and tension-compression fatigue test, the tensile properties and tension-compression fatigue performances of three stress absorbing layer mixtures are analyzed.

通过沥青测力延度试验和应力吸收层沥青混合料拉伸与拉压疲劳试验,比较不同沥青的应力吸收层混合料抗拉伸和抗拉压疲劳特性。