单项选择题
A.高频感应加热B.中频感应加热C.低频感应加热
A.WP≤0.045%,WS≤0.055%B.WP≤0.040%,WS≤0.040%C.WP≤0.035%,WS≤0.030%
A.操作盘过湿B.搭接量过小C.逻辑盘过湿