扭转测试 meaning in English

torsion apparatus

Methods of testing doors ; test for change in stiffness of the door leaves by repeated torsion ; german version en 130 : 1988
门的试验方法.通过反复扭转测试门扇的刚性变化
A ballast intended to be supported only by rigid metal conduit , a fixture stud , or similar devices shall comply with the requirements in section 18 , pullout , bending , and twisting tests
整流器只能由刚性金属导管支撑，装配螺栓或相似的部件必须符合18条，通过拉力、弯曲和扭转测试。