断路器和接触器应至少有一对备用触点以便向控制系统传送信号。
Breaker and contactor should have one pair of spare contacts so that signals can be sent to the control system.
指命发生器及逻辑控制部件，常常是工业无触点程序控制系统(或静止开关控制系统)中的主要组成部分。
The instruction generator and logic control units are the chief components of the industrial contactless programmed control system (or static switching control systems).
主泵，泵采用液气联合驱动及无触点电气控制系统，运行平稳，换向灵敏可靠。
The host pumps auxiliary pump adopts the hydraulicandpneumatic united drive, themovement is nimble and reliable.
主泵、泵采用液气联合驱动及无触点电气控制系统，运行平稳，换向灵敏可靠。
The host pumps and the auxiliary pump adopts the hydraulic and pneumatic united drive, the movement is nimble and reliable.
主泵、泵采用液气联合驱动及无触点电气控制系统，运行平稳，换向灵敏可靠。
The host pumps and the auxiliary pump adopts the hydraulic and pneumatic united drive, the movement is nimble and reliable.
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