...a roofing company.屋顶修葺公司...roofing made from organic and inorganic fibres.有机和无机纤维的屋面材料A gust of wind pried loose a section of sheet-metal roofing...一阵狂风把铺在屋顶上的一块金属片掀起来了。A gust of wind pried loose a section of sheet-me...
Polymerization of isoprene in the presence of ( NdCl 3 + FeCl 3 ) n Phen HAl - ( i - Bu ) 2 was studied.本文报道由(NdCl_3+FeCl_3 ) ·nphen -HAl ( i -Bu ) _2催化体系引发异戊二烯聚合的结果.There is a great deal to learn from Hal's expert ...
目的探讨我国二甲基甲酰胺 ( DMF ) 的生物接触限值 ( BEI ).Objective To explore the biological exposure indices ( BEI ) of dimethylformamide ( DMF ) in China.研究表明,该反应器可有效降解苯甲酰胺.The results show that the new type reactor could degrade benzamid...