Bitumen modification: The low temperature flexing and anti-flowing property at high temperature of bitumen can be improved by adding 3% to 15% (wt %) SBS.
沥青改性：在沥青中加入3%—15%的SBS可改善沥青的低温屈挠性和高温抗流动性能。
Working principle on model WT low-flow single-stage regenerative pumps are presented. Key problems are solved and testing result is got up in the pump developing.
介绍了小流量WT型单级旋涡泵的工作原理、研制中解决的主要问题以及试验结果。
Working principle on model WT low-flow single-stage regenerative pumps are presented. Key problems are solved and testing result is got up in the pump developing.
介绍了小流量WT型单级旋涡泵的工作原理、研制中解决的主要问题以及试验结果。
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