1、Media are self-sealing when and they can be named as directional type.
當 時，介質(zhì)具有自封閉趨勢，屬于“指向型”；

2、With the self-sealing materials.
使用自黏材料。

3、a self-sealing envelop
自粘封口的信封

4、The casing is provided with a self-sealing cover-plate
外殼是自動封口的活動蓋板。

5、Objective:To study the efficacy of three-channel self-sealing sclerotomy in 20G vitrectomy.
目的：探討“三通道”自閉式鞏膜隧道切口用于20G玻璃體切割手術(shù)的可行性和應(yīng)用效果。

self-sealing翻譯