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1·A conduit (18) for an air duster is branched from an intermediate part of an air conduit (17) interconnecting an air supply source (16), which supplies compressed air, and an air tool.

用于空气除尘器的管道(18)从连接空气供应源(16)与气动工具的空气管道(17)的中间部分分支出来，所述空气供应源供应压缩空气。