A new technology for producing calcium propionate from oyster shell under normalpressureandtemperature was studied.
以牡蛎壳为原料,采用常温常压直接法制备无毒食品防腐剂丙酸钙。
2
Optimization of catalysts and experimental conditions for chlorine dioxide catalytic oxidation of refractory wastewater under normalpressureandtemperature were studied.
研究了二氧化氯催化氧化法在处理难降解有机化工废水中催化剂的选择和实验条件的优化。
3
2 SEC Because heat is no longer being transferred to the secondary loop, water pressureand water temperature in the primary loop rise. This is normal and no cause for concern.