But it has limitation in complex formation drilling for its natural thermal instability and high sensitivity to salt contamination, whereas tannin could he modified to widen its using fields.
因其在使用中具有不耐温、不耐盐等较多缺陷，无法适用于特殊复杂的地层，但是通过对其改性，可以拓宽其应用范围。
The test is used to detect surface iron contamination, i. e., iron salt residue from pickling, iron tool scratches on the stainless steel surface, iron deposits at weld areas, and iron oxides.
该检测用于检测表面的铁的污染，如浸酸中铁盐残留，不锈钢表面的铁制工具的刮痕，焊接区的铁沉积以及铁的氧化物。
The modern sediment is an important storehouse of the nutrient salt and pollutant in lakes. Under proper conditions, these internal contamination load sources can cause the eutrophication of lakes.
现代沉积物是湖泊营养盐和污染物的重要储藏库，在一定条件下，这些内源污染负荷可能成为水体富营养化的主导因子。
应用推荐