| 摘要 |
A contact tip (105) includes a first threaded section (135) and a first non-threaded section (140). The length of the first non-threaded section (140) is at least a fifth of the length of the first threaded section (135) along a longitudinal axis (125). The contact tip (105) further includes a first contact surface (145). A diffuser (110) includes a second non-threaded section (175) and a second threaded section (170) configured to mate with the first threaded section (135) of the contact tip (105). The diffuser further includes a second contact surface. The first non-threaded section is configured to elongate along the longitudinal axis as the first threaded section is screwed into the second threaded section past a point where the first contact surface and the second contact surface have established contact. |
