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groove angle
auto.	凹,齿槽角; 焊接坡口角度
compr.	坡口角焊接
el.	凹，齿槽角; 焊缝坡口角度; 录声纹道角; 纹槽角度
oil	槽角
roll.	轧槽侧边斜角
tech.	轧槽边斜角; 焊缝坡口角度; 焊接的坡口角 (度); 齿槽角; 槽角 (度); 凹槽角; 焊槽角度; 焊缝坡口开角
weld.	坡口角度

groove angle: 7 phrases in 3 subjects

Automobiles	3
Electric machinery	2
Technology	2