twin tube
双联式开关管 [电] dual TR tube
双联箱横水管锅炉 double-header boiler
双联树脂管 TWIN HOSE
双开关管串联 Two switches in series
双管串联 serial two-transistor
双极食管导联 Bipolar esophageal lead
车载双联光电瞄准系统主要由折转光管、自准直经纬仪和相应的调制器组成。
Vehicle twin- photoelectrical pointing system mainly consists of reflex light-tubes, a autocollimation theodolite and modulators.
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