1. 线：handle.spin type male square销式手柄 | lineal线 | pin销子

2. 直线的,线性的：in line with 跟...相关 | lineal 直线的,线性的 | lineal thinking 直线思维

3. 直系的：lineal 正统的 | lineal 直系的 | lineally 直系地

4. lineal的翻译

4. 标尺：Symbolleisten 工具栏 | Lineal 标尺 | Anmerkungen 批注

1. 直系的
    A lineal descendant of a particular person or family is someone in a later generation who is directly related to them.

1. arranged in a line

2. in a straight unbroken line of descent from parent to child

    e.g. lineal ancestors
           lineal heirs
           a direct descendant of the king
           direct heredity

    Synonym: direct