您要查找的是不是：
- 线thread
- U型线U-line
- 在线in-line
- U型U shape
- 型线shaped conductor
- U型壳U - shell
- U型槽U -Shape Groove
- 分型线parting line
- U型箍U-ferrule
- 纵剖型线bow and buttock lines
- U型拉槽U cutting
- 流型线stream lining
- U型挡板U stop prate
- 带型线ribbon line
- U型螺钉U type screw
- 外型线form lines
- U型结构U-Structure
- 丙型线[医] gamma line
- U型弯曲U-bending
- T型线图lines plan
