Do you have a preventive maintenance program?
您有预防性维护计划吗？
Do you have an established preventive maintenance program?
你们是否建立了预防性的维护程序？
Is there a formal documented preventive maintenance program in place?
工人是否有记录在案的正式的维修记录？
Is there a formal documented preventive maintenance program in place?
工人是否有记录在案的正式的维修记录？
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