Cryogenic vessels which are retained by customers and where the medicinal gas is refilled in place from dedicated mobile delivery tanks need not be sampled after filling provided the filling company delivers a certificate of analysis for a sample taken from the mobile delivery tank 用户保留的低温容器和从专门从事移动运输罐中重装的医用气体,倘若在充气后供应公司递交了一份从该移动运输罐中取样化验的分析合格证的,不必再取样。