drop-in substitute

基本解释

Appropriately designed drop-in fuels can substitute for diesel and aviation fuel, which ethanol cannot.
适合的设计的dropin燃料能够够替代柴油和航空用油，乙醇是做不到这点的。
Prospects the application of hydrocarbon refrigerants to automobile air-conditioners and considers that they may be a drop-in substitute for R12.
同时，展望了碳氢制冷剂在汽车空调中的应用前景，认为其有可能成为R12的直接充注替代物。
By a combination of theoretical analysis and performance testing, it is shown that refrigerant mixture R407C is a drop-in substitute for R22 in inverter heat pump air-conditioners.
通过理论分析及空调器整机性能试验，说明混合工质R407C是变频冷暖空调器中R22 的灌注式替代工质。