| 摘要 |
PROBLEM TO BE SOLVED: To improve sealing ability while securing a necessary gas passage in a connecting part of a gas pipe and a gas control device. SOLUTION: A gas communicating hole 21 elongated parallel to the axis of the gas pipe 20 is formed on the outer peripheral side of the gas pipe 20. The minor diameter W1 of the gas communicating hole 21 is half the outer diameter of the gas pipe 20 or less. A gas inlet hole 13 having the substantially same shape as the hole 21 is made in the central lower part of a gas cock 10 having a gas passage formed inside thereof. The gas pipe 20 and the gas cock 10 are fixed with the gas communicating hole 21 facing on the gas inlet hole 13 by a metal fitting 30 with a packing mounted on the outer peripheral part of the gas communicating hole 21 and the gas inlet hole 13. COPYRIGHT: (C)2005,JPO&NCIPI
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