| 摘要 |
A natural circulation rectangular ventilation window for a vinyl house is provided to control the ventilation amount, to simplify the structure and to allow it to be installed easily. A natural circulation rectangular ventilation window for a vinyl house comprises a tightening clip(1d); a wind guard step(1a); a rainwater defend sill(1b) and a drain hole (1f) blocking the rainwater inflow; a plurality of engagement grooves; an outer cover band zipper(7b); and a fixing tightening clip(1c) of the inner skin and an inner fixing stand(8).
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