短语词组短語bobbin case tension spring 梭匣簧Shuttle bobbin case 梭殼bobbin case latch 梭匣柄Threading the bobbin case 底線的穿線方法Shuttle bobbin case latch lever 梭殼針舌杆Shuttle bobbin case latch spring 梭殼針舌彈簧 返回 bobbin case