shieldedadj.有屏蔽的动词shield的过去式和过去分词.shieldn.盾；盾状物；防卫物vt.保护；庇护Shielding ratio屏蔽率shield machines盾构掘进机shield hoisting盾构吊出shielding cavity屏蔽腔shield potential屏蔽罩电位shielded nucleus屏蔽核shielded effectS屏蔽效应shielding effect屏蔽效应shielding factor屏蔽因数,屏蔽因子,屏蔽系数shielding fabric屏蔽布