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液位上升时,翻柱由白色转为红色,下降时,翻柱由红色转为白色,从而实现液位的指示。<span style="font-size: 10.5pt; font-family: 'Times New Roman'; font-family: 'Times New Roman'; font-family: 'Times New Roman'; font-family: 'Times New Roman'; font-family: 'Times New Roman'; font-size: 10.5pt; font-family: 'Times New Roman'; font-size: 10.5pt; font-family: '宋体'; font-size: 10.5pt; font-family: '宋体'; font-size: 10.5pt; font-family: '宋体'; font-size: 10.5pt; font-family: '宋体'; font-size: 10.5pt; font-family: '宋体'; font-size: 10.5pt; font-family: '宋体'; font-size: 10.5pt; font-family: 'Times New Roman'; font-size: 10.5pt; font-family: '宋体'; font-size: 10.5pt; font-family: 'Times New Roman'; font-family: 'Times New Roman'; |