砂质的隧道壁侧是用从营地各处拾荒来的木条加以支撑。
The sandy walls of the tunnels were shored up with pieces of wood scavenged from all over the camp.
随后，在筒状模具(22)持续旋转的同时，将熔体(L1)引到所述外筒状体(14)的内周壁侧，从而形成内筒状体(12)。
Subsequently, molten (L1) is introduced to the inner circumferential wall side of the outer tubular body (14) while sustaining rotation of the tubular die (22) thus forming an inner tubular body (12).
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