down stream sand injection  泵后加砂注入

sand injection technology  补砂技术

sand face injection pressure  井底注入压力

sand filling and grout injection  灌砂注浆

sand—sand juxtaposition  砂岩对接

coastal sand and continental shelf sand  海岸砂和大陆架砂

concial sand from coarse sand  粗砂锥辗硅砂

dike of sand pile and sand quilt  砂桩砂被堤

prevent sand and confrol sand  防沙治沙

Sand-Blowing and Sand-Filling Ground Leveling  吹填砂场平

fuel injection system with high injection pressure  高压喷油系统

Interval between Pilot Injection and Mail Injection  预喷与主喷间隔

reduced water injection pressure and im-proved injection capacity  降压增注

reducing water injection pressure and improving injection capacity  降压增注

rotary injection and reflection injection molding machine  旋转注射反应注射成型机

rotary injection reaction injection molding  反应注射成型

sequential multiple injection electronic controlled injection  顺序多点电喷

a rope of sand  不牢固的结合

Abandoned sand excavation land  挖沙废弃地