单词	elevator systems
释义	elevator systems 电梯系统
随便看	screwthreads screw threads Screw-thread Sets Screw thread sheath screw-thread smoke tube screw thread steel screw-thread steel screw thread steel reinforcing bar screw thread system screw-thread system screw thread tester screw-thread tester screw thread tolerance indicator screw thread tool gage screw-thread tool gage screw thread tool gauge screw-thread tool gauge screw thread turning flnial screw thread unloadingmechanism screw thread wreck screw thrust screw tightener screw tightening screw tightening device screw tighten press