国产av在线观看,国产欧美日韩久久久久,国产精品久久久久久人妻,国产精品沙发午睡系列

December 25(Wednesday) , 2024

Customer / 客戶服務(wù)

username:
password:

Power Professional D

PositionHome > Customer > Power Professional D

Semiconductors tube

發(fā)布時(shí)間: 2010/04/08 人氣 :1741
·Semiconductors tube
Semiconductor tube has three feet. Exerting a smaller current signal between B, E, C, B, E can change the current flow through E, C, so it plays a role of current valve and current amplification. Semiconductors tube is a current model driven device.
?