nigrescence in Vietnamese
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Sentence patterns related to "nigrescence"
Below are sample sentences containing the word "nigrescence" from the English - Vietnamese Medical Dictionary. We can refer to these sentence patterns for sentences in case of finding sample sentences with the word "nigrescence", or refer to the context using the word "nigrescence" in the English - Vietnamese Medical Dictionary.
1. 22 After each time roll changing, must inspect the lubricant whether to harden the nigrescence , whether by impurity pollution, whether to oxidize the emulsification.