一、前言DSJ-4型翻斗式长期自记雨量计(以下简称长期自记雨量计),是由黄委会水文局和天津气象海洋仪器厂在引进国外先进仪器的基础上,经过分析、消化、并结合我国具体情况,对仪器的某些部件作了改进后试制成功的。经现场对比试验的结果证 I. Preface DSJ-4 dumping long-term self-record rain gauge (hereinafter referred to as long-term self-record rain gauge), by the Yellow River Hydrological Bureau and Tianjin Meteorological Ocean Instrument Factory in the introduction of foreign advanced equipment, based on analysis, digestion , Combined with the specific circumstances of our country, some parts of the instrument has been improved trial after successful. The field test results of the contrast test