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right-hand helix
auto.
右螺旋刀齿
el.
右旋线
tech.
右旋螺
旋
线
telecom.
右旋螺旋线
right-handed helix
agric.
右向螺旋
;
右螺旋线
el.
右旋线
tech.
右手螺旋
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