片语
Nonstandard Spur Gears变位齿轮概述
Spur Gears &Rack[机] 正齿轮;直齿圆柱齿轮(spur gear的复数)
involute spur gears渐开线直齿轮
asymmetrical involute spur gears非对称渐开线直齿轮
spur wheel正齿轮
spur bevel gears直齿锥齿轮
SPUR & HELICAL GEARS(Spur) (美)斯普尔(人名)
Straight and spur gears可测量直线正齿轮