吸收率的计算公式为()。 ["A、A","B、B","C、C","D、D"]
在热缩套管的封合过程中,电缆芯线接续完毕后,下列操作步骤中正确的顺序是:() ["①对已接续芯线进行绑扎","②在电缆两端切口处安装专用屏蔽连接线","③安装金属内衬套管并粘接固定纵剖拼缝,并将其两端用PVC胶带进行缠包","④用清洁剂对电缆外护层进行清洁并用砂布打磨清洁部位","①在电缆两端切口处安装专用屏蔽连接线","②对已接续芯线进行绑扎","③安装金属内衬套管并粘接固定纵剖拼缝,并将其两端用PVC胶带进行缠包","④用清洁剂对电缆外护层进行清洁并用砂布打磨清洁部位","①对已接续芯线进行绑扎","②在电缆两端切口处安装专用屏蔽连接线","③用清洁剂对电缆外护层进行清洁并用砂布打磨清洁部位","④安装金属内衬套管并粘接固定纵剖拼缝,并将其两端用PVC胶带进行缠包","①在电缆两端切口处安装专用屏蔽连接线","②对已接续芯线进行绑扎","③用清洁剂对电缆外护层进行清洁并用砂布打磨清洁部位","④安装金属内衬套管并粘接固定纵剖拼缝,并将其两端用PVC胶带进行缠包"]
什么叫绝热过程?
在电缆接头分歧电缆一端,小电缆应在大电缆的()方。 ["上","下","都可"]
什么是凝汽器的最佳真空?
何谓疲劳和疲劳强度?