| 摘要 |
(1) That your petitioners have made an invention which when used in conjunction with compressed air equipment contains an element that visibly changes and indicates that moisture is being transmitted through the air line delivery tubing from the compressor to the tools being served. This visible indication directs the operator to attend to the compressed air producing equipment and correct and adjust as necessary to prevent contamination of the air flow as claimed in the specification submitted herewith.
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