To determine the pilling and fuzzing characteristics of textile fabrics. chemical fiber, blended, knitting, woven fabrics.用于测试毛织物和化纤纯纺 、 混纺 、 针织 、 机织物的起毛起球状况.Random Tumble Pilling Tester . To determine the pilling and fu...
钋是高放射性的元素,金属.Polonium is a highly radioactive element and a metalloid.两个遗留有钋的星球被一些不明原因突然破坏.Two old plutonium disposal plants damaged at once by some unestablished reason.钋的同位素在自然界中的确存在,但是相当罕见.The isotope does occur in na...
神秘的流浪者, 不知疲倦的守望者, 使者——他们就是寂静漫游者.Mysterious wanderers, tireless scouts, heralds — these are the Silent Striders.“喷气推进实验室(JetPropulsionLaboratory)”的工程师们正在创造一种微型漫游者.Engineers at the Jet Propulsion Laboratory are creating a ...