underground survey in Vietnamese

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Sentence patterns related to "underground survey"

Below are sample sentences containing the word "underground survey" from the English - Vietnamese Dictionary. We can refer to these sentence patterns for sentences in case of finding sample sentences with the word "underground survey", or refer to the context using the word "underground survey" in the English - Vietnamese Dictionary.

1. 23 When he was making an underground survey of the New Almaden mine he stayed underground for twenty hours at a stretch.