Stop thinking too much, it's normal not to know all the answers.
不要再多想了，不知道所有问题的答案很正常。
Only normal (not suspect), domestic animals are to be sampled.
只能对正常的(没有怀疑的)家畜进行取样。
For KFR type air-conditioner, if refrigeration normal, not heating, its fault mainly in four electromagnetic valve or its control circuit.
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.
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。
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