The product features 2-SPDT drycontacts, an internal alarm, and a blue finish that is not confused with fire alarm stations. Auxiliary contacts can be used for remote annunciation.
同时，配置了2-SPDT干触点、内部报警器及防火蓝油，并可通过辅助触点实施远程控制。
2
The dry battery is capable of enabling the impurities invading into the area between the contacts to automatically embed to the soft metal to maintain good contact of the contacts;
本实用新型，可使侵入到触点间 的杂质自动嵌入在软金属中，保持触点间接触良好；
3
The first soft metal layer and the second soft metal layer are correspondingly plated on the contacts of the positive pole and the negative pole of the dry battery.