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【Daily Question】Utilities - Mechanical & Electrical - 20190813

2019-08-13View Original

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During normal production, the type testing of safety components shall be carried out at least once every ( ) years; Control cabinets, traction machines, rope end assemblies, etc., once every two years ; The entire unit undergoes a type test every ( ) years. A、One ; Two B, one ; Three C’s, one ; Four D, two ; Four Answer: B

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