2830.Vacuum subsystems are those units and components used to generate,deliver and regulate below atmospheric pressure air,including pumps,regulators,lines,etc.,through and including the manifold.

A. Make sure the probe cover is in good working condition with no evidence of damage.

B. Make sure the probe plug is in good condition and there is no signal of damage.

C. The probe lid is insured to be in ideal condition and out of damage.

A. When the temperature is below zero,depressurize the water system.

B. If the temperature drops below zero,deflate the water system.

C. If the temperature decreases to less than zero,drain the water system.

A. There are some environmental reasons of the manufacturers or operators such as the location of battery compartments.

B. Some environmental factors are within the control of the manufacturer or the operator such as the location of battery compartments.

C. It is the manufacturer or the operator's environmental factors,such as the location of the battery compartments.

A. Warnings,cautions and notes may be used to highlight or repeat important points.

B. Warnings,cautions and notes may be used to highlight or emphasis important points.

C. Warnings,cautions and notes may be used to highlight or emphasize important points.

A. 维修破损的泵。

B. 拆卸相应的泵。

C. 更换故障泵。

A. For normal operations,make sure the pressure relief valve is closed.An open pressure relief valve is a symptom of a problem in the fuel vent system.

B. For normal operations,make sure the shutoff relief valve works.If you open pressure relief valve,that indicates a problem in the fuel vent system.

C. For normal operations,make sure you close the pressure relief valve.If you leave it open,a problem will be shown in the fuel vent system.

A. Connect the cover immediately.

B. Attach the cover temporarily.

C. Install the cover permanently.

A. 液压系统包括将一定压力(包括泵、压力调节器、管路、阀门)的液压油输送到一个汇聚点(总管),再分配到用户系统的部件和组件。

B. 这些单位和组件在压力作用下将液压油输入到包括油泵、压力调节器,管路,活门等部位,最后到达一个公共地点,即分配阀,是为了再次分配到其他设定好的系统中。

C. 这些单位和组件将液压油输入到各个压力组件中,包括油泵、压力调节器,管路,活门等。后来液压油汇聚到一个通用点(分配阀),为了再分配到其他定义好的系统中。

D. C.这些单位和组件将液压油输入到各个压力组件中,包括油泵、压力调节器,管路,活门等。后来液压油汇聚到一个通用点(分配阀),为了再分配到其他定义好的系统中。

A. Obey the safety precautions when you do work with high voltages.

B. Obey the safety warnings when you do work with high impedance.

C. Obey the safety cautions when you do work with high capacitance.

A. The tune time for a frequency not in memory is 2 to 4 seconds typical,7 seconds maximum.

B. The adjust time for a frequency not in memory is 2 to 4 seconds typical,7 seconds maximum.

C. The tune time for a frequency not in memory is 2 to 4 seconds common,7 seconds maximum.