long pot life meaning in Chinese

长存期

Boron coated with different content ap on the rheological properties of the slurry containing 30 % boron have been carried out with the help of the sv2 / sv2fl measuring system in haake rotary viscometer . the experimental results reveal that the rheological properties of the slurry of boron coated with 20 % ap is best , namely , the slurry has a good levelability and a long pot life . the optimum conditions in the preparation of the boron - based propellant with 30 % boron in weight were obtained , and a technical and theoretical foundation has been established for the formulae determination
3 、用进口haake旋转粘度仪对不同包覆硼粉在硼含量为30以上的实验配方药浆中的流变特性研究，筛选出用20 ap包覆的硼粉所制成的药浆不仅流平性好而且适用期长，同时找到了含硼量为30的高含硼量推进剂药浆成功研制的成熟工艺过程及条件，为配方的进一步定型奠定了较扎实的技术和理论基础。