NPN单管放大电路
NPN single-tube amplifier
垂直单管供暖系统
vertical one-pipe series heating system
单管PCR扩增
one tube PCR amplification
单管多重PCR
Single-tube complex PCR
Single-tube multiplex-PCR
单管二次氨化
singlepipe secondary ammoniation
单管反应器技术
single pipe reactor technology
单管分层开采
single-string selective zone production