无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

單項選擇題

The control mode where the position of the final control element has a linear relationship with the position or value of the controller, variable is known as()

A.two position control
B.proportion control
C.reset control
D.rate control

微信掃碼免費搜題