请问这句话什么意思? for extruder, as a minimum all barrels and screws / screw elements shall be nitrided and weld hard alloy overlaid flight at wet end, the barrels in contact with these alloy shall be hard with stellite. 对于挤压机来说,其最低要求即为所有的筒和螺丝/螺钉紧固件都必须进行氮化处理,并且要在接液端焊上硬合金堆焊层,然后与合金接触的筒必须堆焊斯泰利合金。flight在这里是什么梗????挤压机上面有筒吗?查看更多