An inflatable bag used to plug a gas main so that maintenance can be carried out.
单词 | θ102751 |
释义 | the world > space > relative position > closed or shut condition > that which or one who closes or shuts > [noun] > that which closes an aperture > inflated bag to plug gas-main (1) gasbag1880 An inflatable bag used to plug a gas main so that maintenance can be carried out. |
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