These Full Face Mask Respirators Had A Surprising Comfort Rating

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These Full Face Mask Respirators Had A Surprising Comfort Rating

"those / these" are determiners and are used before nouns to refer to a particular group of things / people, e.g. these people / those rules / those buildings. Update: 题主问的是What are those? 然后他.

Half Mask & Full Face Respirators

TMS Comfort Series Nasal CPAP Mask Full Face - Reusable CPAP Supplies ...