Regular vinyl addition polymers may be obtained from particularly strained endocyclic double bonds.由带特殊张力的桥环双键可以得到规整的乙烯类加成聚合物.Use vinyl seam adhesive where vinyls overlap.塑料布相叠处用塑料封口胶粘起来。This compilation was first issued...
And the plan of bittern replaced salt was put forward.提出了以卤代盐制碱的设想.Mineral products has oil, natural gas, bittern, alluvial gold to wait.矿产有石油 、 天然气 、 盐卤 、 沙金等.Because old bittern answers ooze , already affected plant ar...