高手们帮忙看看是什么意思？谢谢了

we just need industrial grades, but it is very important that they offer a strongly delayed swelling, at least approx. 10 minutes at 20% in water. NDJ-79 we don’t know. Are it spindles or cone/plate? At how many s-1 does the measurement happen? 化工产品是：羟丙基甲基纤维素HPMC&羟乙基甲基纤维素HEMC， 这里有这两种的产品的厂家吗？