...螺丝和螺母的机械强度试验 Test of mechanical strength of screw and nut for mounting 螺丝和双螺母screw and double nut 安装螺丝和螺母的机械强度试验 test of mechanical strength of screw and nut for mounting ..
双语例句
1
By the use of double hidden layered BP artificial neural network a mathematical model of relationship between wear rate of screw-nut pair and sliding speed is established.