Technical troops specializing in mapping,meteorology,water supply and avia-tion have provided such services as geographic survey,weather forecast,water source exploration,aerial sowing and artificial pre-cipitation in the western region.

• 测绘、气象、给水、航空等技术部队为西部地区提供了大地勘测、气象预报、水源探测、飞播造林、人工降水服务。