This work must go forward without lag.

这项工作必须毫不迟延地进行。

youdao

Valves must be properly timed. They must seat tightly and operate without lag.

气门必须严格定时，落座严密并且开启无滞怠。

youdao

Valves must be properly timed. They must seat tightly and operate without lag.

气门必须严格定时，落座严密并且开启无滞怠。

youdao