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1.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。收藏指正
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