| 摘要 |
An insulated, cylindrical protective sleeve is fitted around a support nose and diffuser orifices of a welding torch where the cylindrical protective sleeve has a front clearance opening and circumferentially spaced openings communicated with the diffuser orifices and a contact tip having a central wire guide bore with a diameter only slightly larger than the diameter of a welding wire, a threaded rear body, a front extension passing through the front clearance opening and a radially extending flange between the rear body and the front extension to hold the cylindrical protective sleeve around the nose when the body is screwed into the threaded bore of the main assembly of the torch.
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