问题: 一些专业词汇翻译，急啊急啊！！
number of teeth
tooth profile angle
pitch or reference dia
maior dia
minor dia
form dia "a" min
form dia"b" max
min eff tooth thk
max eff tooth thk
min act tooth thk
max act tooth thk
meas over two 15.240 dia pins(ref)
pins to have 12.000 flat
是图纸上面的，字母全部是大写，爷爷派给的翻译任务，我不相信自己的智商，有求各位了
解答:
number of teeth ,,,齿轮
tooth profile angle ,,,齿形角
pitch or reference dia ...???程度..參考,,吥確定,
maior dia ????都是些专业术语,很难翻译呀，
minor dia 较小的..
form dia "a" min ????
form dia "b" max???
min eff tooth thk ???太难了,
下面的都不敢看了,
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