A . A、20kv/10mA20kv/20mA20kv/30mA20kv/40mA20kv/50mA30kv/50mA40kv/50mA50kv/50mA
B . B、20kv/10mA30kv/10mA40kv/10mA50kv/10mA50kv/20mA50kv/30mA50kv/40mA50kv/50mA
C . C、20kv/10mA30kv/10mA40kv/10mA50kv/10mA50kv/50mA
D . D、20kv/10mA20kv/20mA20kv/30mA20kv/40mA20kv/50mA50kv/50mA
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