老师随机检查出席率时，每当点到程明的名字，替身就会提他喊到。
When the teacher randomly checks the attendance, the double is there to say "present!" when Cheng's name is called.
检查现场日期排程并确保设备和操作人员在指定时间内到岗。
Checking on-site dates and ensuring the machines and operators are available and prepared to achieve the required times.
紧力测试对热交换器的管程与壳程，检查法兰垫圈是否紧密。
Tightness test both the shell and tube sides of the exchanger to check that the flange gaskets are holding tight.
老师随机检查出席率时，每当点到程明的名字，替身就会提他喊到。
When the teacher randomly checks the attendance, the double is there to say "present!" when Chengs name is called.
老师随机检查出席率时，每当点到程明的名字，替身就会提他喊到。
When the teacher randomly checks the attendance, the double is there to say "present!" when Chengs name is called.
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