The key technologies such as the joint for cross-feed and cross pressurization were put forward.
阐明了交叉输送连接器和交叉增压等关键技术。
2
The APU usually takes its fuel supply from the LH engine-feed line, but when the cross-feed valve is open, the RH engine-feed line can also supply the APU with fuel.
APU通常从左发动机供油管路获得燃油，如果交输活门打开，右发动机供油管路也可以供应apu燃油。
3
During a facing operation, feed is provided by the cross slide, whereas the depth of cut is controlled by the carriage or compound rest.