?排栅管

排栅管

?栅极中点校直的电子管

...极中点校直的电子管 aligned grid tube; aligned grid valve; aligned-grid tube; aligned-grid valve 栅极中点校直的电子管阀 aligned grid valve ..

?栅排列管

... algol language ALGOL语言... aligned-grid tube 栅排列管... aligning key of octal base 八脚座校对匙...