“掌子”造句

公用之马,掌子最差.
The common horse is worst shod.

塞尼山隧道是从两头的掌子面同时掘进的.一头在法国,一头在意大利,最后在中间汇合.
The Mont Cenis was bored from two different headings, one in France and one in Italy.

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