| 摘要 |
PURPOSE: A bellows tube for identifying gas is provided to manage and maintain efficiently various gas line and improve productivity by using a gas indication portion having predetermined colors. CONSTITUTION: A multitude of screwed pattern(11a) is formed in a constant interval on a path tube portion(11). A plurality of adapter(12) is installed at both end portions of the path tube portion(11). A gas indication portion(13) having a constant color is formed on an outer surface of one adapter(12) of the adapters(12). The gas indication portion(13) is formed by a synthetic resin. The kind of gas passing a gas line is identified by the color of the gas indication portion(13). An interval maintenance portion(14) having an inserting hole is arranged between the gas indication portions(13).
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