钻小的工件时,要用台虎钳,钳紧后再钻,严禁用手去停住转动着的钻头。
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To prevent the riser system from buckling under its own weight,upward tension is provided by the().
A. riser stabilizers
B. guideline tensioning system
C. riser tensioning system
D. guideline stabilizer
ZXDU3000组合电源系统交流输入每一相电压都()时,监控系统给出交流输入断告警,红色告警指示灯亮,蜂鸣器响起。