It is made of a bed of wool felting together.它是由一层层毛毡螺旋缠绕粘接制作而成.Fabric : A cloth produced especially by knitting, weaving, or felting fibers.尤其是针织, 机织, 或毡纤维,所生产的布.Lipid layer of a hydrophobic surface on which the anti fe...
The percentage of antimony may be left to the battery manufacturer.锑的百分含量由各蓄电池生产厂自己掌握.Antimony abounds in out country.我国盛产锑.Antimony adds to the rigidity of the casting.锑能增加铸件的硬度....