| 摘要 |
A housing (5) is formed with a cylinder communication bore (6) able to communicate with an interior space of a gas cylinder (1), a gas passage (7) and a joint attaching portion (8). The joint attaching portion (8) is provided with an engaged portion (21). A joint (14) is attached to the joint attaching portion (8). The joint (14) is provided with a connecting portion (16) to which a gas instrument is connected, a communication passage (18), and an engaging portion (19). The connecting portion (16) is opened to provide an instrument communication bore (17). The instrument communication bore (17) communicates with the cylinder communication bore (6) through the communication passage (18) and the gas passage (7) in order. The engaging portion (19) meshes with the engaged portion (21) unseparably.
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