炭粒式话筒
granular microphone
carbon granule microphone
滚筒式粒子过滤机
Drum-type solid particle filter
电动式话筒
electrodynamic microphone
一锅法碳-碳双键的合成
one - pot carbon - carbon double bond formation
不饱和碳碳双键
unsaturated double carbon-carbon bond
不对称碳碳键形成
Asymmetric C—C bond forming