题目详情
单选题 What is the good method to tighten motor and frame screws? 拧紧电机和框架螺钉的好方法是什么
A. Tighten all screws at once without preparation 直接一次性拧紧
B. Tighten all screws randomly 随意拧紧
C. Install all screws loosely, then tighten each arm one by one 先松装再逐个拧紧

学科:默认课程
时间:2026-01-16 14:03:54
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