The carbene also reacts with alcohols.碳烯也可与醇反应.New , sterically demanding 1, 3 - dialkylimidazolinium salts used as N - heterocyclic carbene precursors were synthesized and characterized.合成并表征了一种新型的有空间需求的N - 杂环卡宾前驱体1, 3-...
Scientists have described the Aral sea as the site of the worst ecological disaster on earth.科学家把咸海描述成地球上最严重的生态灾难发生地。All BRABUS drivetrain elements are operated with ARAL high - performance lubricants.所有的BRABUS传动系统元素经营与咸...
有许多几何参数影响这些系数, 且设计外型变化很大.A large number of geometrical parameters influence these coefficients, and range of design configuration is wide.组装精度 、 焊接工艺 、 焊缝外型 、 探伤焊缝以及钢结构矫正.Precision assembly, welding technology, weld desi...