n.丁烯
Its main components include propane, butane and butylene. 主要成份是丙烷、丁烷、丁烯等。
Its main components include propane, butane and butylene . 主要成份是丙烷、丁烷、丁烯等。
By means of a micro-twin-screw blender,the blending of lignin with poly(butylene terephathalate)(PBT) was studied. 利用微型双螺杆共混仪研究了木质素与聚对苯二甲酸丁二酯的共混过程。
There is a point of optimum temperature in the curve, at which the yields of propylene and butylene are the largest. 丙烯及丁烯的收率随着反应温度的升高呈现先增加后降低的趋势,分别存在一个最佳温度点,且丙烯收率的最佳温度高于丁烯的。
Decreasing sunlight or reducing the precursors of 3 methyl 2 butylene 1 thiol (MBT) was the useful method to avoid lightstruck. 减少光照或减少其前驱物质的产生是降低啤酒日光嗅味的有效途径。
