At regular monthly visits, the ring can be made tighter or looser by injecting saline into the port.

在每个月的常规就诊，可以通过注射盐进入通道来缩紧或者放松环。

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At regular monthly visits, the ring can be made tighter or looser by injecting saline into the port.

在每个月的常规就诊，可以通过注射盐进入通道来缩紧或者放松环。

youdao