Therefore, it was considered to be of considerable significance to render pullulan positively charged in an aqueous solution, its inherent characteristics being retained. 因此，普魯蘭多糖在水溶液中帶有正電荷而其固有特性不變的性質(zhì)非常重要。
In the paper, the downhole temperature affection on the inherent vibration characteristics of the drillstring containing flowing drill fluid is analysed. 摘要本文分析了考慮內有鉆井液流體流動(dòng)時(shí)井下溫度變化對鉆柱振動(dòng)固有特性的影響問(wèn)題。
