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。