预漂 meaning in English

prebleaching

When the sensing head equipped with rubber 4 # with diameter of 8mm and length of 12mm is pressed and its incipient wavelength shifts 0 . 5 - lnm , its alarming level can be set as 1nm , and its response tune for petrol is 5 minutes
用直径为8mm 、长为12mm的4 # (上述配方)橡胶棒装备该传感头，传感头的初始波长预漂0 . 5nm ? 1nm时，传感器的漏油报警限可设定1nm ，对汽油的溶胀响应时间为5分钟。