| 摘要 |
A diving face mask comprising a lens frame having a top, transversely opposite sides curving downwards from said top, a bottom being continuous with said opposite sides and opposed to said top, and a lens holding portion, a main frame having a tubular skirt extending rearwards from said lens holding portion; a front lens held by said lens holding portion; a strap connected to both sides of said main frame used to maintain the mask on a wearer's face; and a purge valve mounted on said main frame and adapted to be opened outwards.
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