sound the alarm bell 中文意思是什麼
sound the alarm bell
解釋
鳴鐘報警-
The concentration of mathane monitor controlled by chip microprocessors, is able to sound the alarm bell based on the limit of mathane concentration, and start device to drain the gas at the same time
本文設計的用單片微機控制的甲烷濃度報警監控儀,是採用熱催化原理(俗稱黑白元件)探頭製成的甲烷濃度測量儀,適用於中小型煤礦井下各作業場所中測量空氣中的甲烷濃度。
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