| 摘要 |
A welding unit for building up the inside of vertical holes that must be subsequently reamed, the device comprising a mechanism utilizing a semi automatic welding machine and which includes means to fasten the end of a feeder cable and nozzle to the top of a rotary ground clamp having a one eight inch hole drilled through the center thereof for a wire to feed therethrough and which passes through the feeder cable mounted on a inside of a threaded shaft and then out of a nozzle.
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