Comparing with polyurethane, the prospects of the applications of isobutene telechelic oligomer are presented.并与聚氨酯材料相比较;说明了聚异丁遥爪预聚物的主要应用前景.Tert - octylamine was prepared with di - isobutene and hydrocyanic acid as mine ...
Investigators have identified a bulldozer operator.调查人员已认定一名压路机司机.A bulldozer finally dug up beneath the front gate to create enough overhead clearance.最终是一台挖土机将前门下挖深才造出足够的车辆顶部通行间隙....