| 摘要 |
PURPOSE: A heating device of a pipe fitting part is provided to increase the quantity of heat by surrounding and heating first and second outer sockets with a heating jacket. CONSTITUTION: A second inner socket is combined with a first inner socket. A first outer socket(42) is semicircular. A second outer socket(44) is attached to the outer circumference surface of the first and second inner sockets. A fixing ring(50) maintains the combination of the first and second outer sockets. A heating jacket delivers heat.
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