It is then circulated back along the exterior of the tunneling machine to help cool the vitrified rock as the tunneling machine forces its way forward.

然后，当隧道钻机还在强行向前钻进时，锂就回过来消散在隧道钻机的表面来帮助冷却玻璃化了的岩石。

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It is then circulated back along the exterior of the tunneling machine to help cool the vitrified rock as the tunneling machine forces its way forward.

然后，当隧道钻机还在强行向前钻进时，锂就回过来消散在隧道钻机的表面来帮助冷却玻璃化了的岩石。

youdao