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moving contact
auto.	电器动触点
mech.eng.	滑动接触〔接点〕
met.	滑动触点
oil	动触点
space	滑动触［接］点
tech.	滑动接点
wind.	活动接点; 移动接触; 动触头; 活动触点

moving contact: 6 phrases in 3 subjects

Automobiles	1
Rail transport	1
Technology	4