来源：学生作业帮 编辑：拍题作业网作业帮 分类：英语作业 时间：2024/04/28 00:30:32
抽真空过程中要注意腔室的真空计示数以及蝶阀之后foreline之上的5torr真空计
After pulling out in the vacuum process must pay attention to the cavity room the suction gauge reading as well as the reed valve,above the foreline 5torr suction gauge
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