| 摘要 |
<p>Appts. comprises a burner with flat upper and lower walls connected by side walls, a front end wall and an open rear end. A fuel inlet is located in the front end of a side wall for connecting to a fuel source via a conduit and a handle is secured to the same side wall to enable the burner to be inserted into and slide along the lap joints. A flame issues from the open rear end, fuses the overlapping layers of the joint. The burner sealing appts. is portable, is operated by one man and produces dependable and effective lap joints.</p> |
