对于KFR型空调器，若制冷正常，而不制热，其故障主要发生在四通电磁阀或其控制电路。
For KFR type air-conditioner, if refrigeration normal, not heating, its fault mainly in four electromagnetic valve or its control circuit.
其中大四通和双管结构是组成采油树的主要部件，也是整个装置的主要承压部件。
And the big tubing cross and the double barrel structures are compose the production tree the major component, is also the entire installment main bearing pressure part.
直通式旋塞阀主要做切断用，三通式和四通式用于分配用于分配介质流量。
Straight-through processing Xuan Sefa mainly used to do cut off, three-and four-way-to medium allocated for the distribution of traffic.
奥迪(AUDI)系列轿车采用的防抱死制动系统(abs)主要有三通道四传感器abs和四通道四传感器abs两大类多种型号，虽然各型abs的结构与分布有所不同，但是其控制过程大同小异。
The ABS adopted by AUDI series cars are divided into 3 tunnel 4 sensor ABS and 4 tunnel 4 sensor ABS. Their structure and distribution are different but their control process are almost the same.
奥迪(AUDI)系列轿车采用的防抱死制动系统(abs)主要有三通道四传感器abs和四通道四传感器abs两大类多种型号，虽然各型abs的结构与分布有所不同，但是其控制过程大同小异。
The ABS adopted by AUDI series cars are divided into 3 tunnel 4 sensor ABS and 4 tunnel 4 sensor ABS. Their structure and distribution are different but their control process are almost the same.
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