pic16f73编写标准警音发生，包括110、119、120、qq、国宾、开道、工程、防空、110+119等现行所以标准警音发生。-pic16f73 preparation of the standard warning tone occurred, including 110,119,120, qq, the Ambassador, to clear the way, engineering, air defense, 110+119, etc. Therefore, the current