upper neutron shielding上部: headpiece; ridge中子: neutron屏蔽: shield; screen; screening中子屏蔽: neutron shield中子屏蔽材料: neutron shielding material下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:上部中子屏蔽,即可在微信中查询翻译