chasern.猎人;驱逐舰;烈酒后饮品;雕刻工;螺纹梳刀
chasers for unified fine thread统一细螺纹板牙
chaser for unified coarse thread统一粗牙螺纹用螺纹梳刀
chasers for unified coarse thread统一粗螺纹板牙