平衡(杆式)继电器, 旋转衔铁式继电器的英文

beam relay

• 平衡:    balance; equilibri ...
• 杆:    shaft; rod; bar
• 式:    type; style
• 继电器:    electric relay; re ...
• 旋转:    revolve; gyrate; r ...
• 衔铁:    armature; anchor; ...