所述弹性膜设置有外切所述开口并从所述开口横向延伸的多个褶皱。
The membrane is configured with a plurality of pleats circumscribing the opening and extending laterally from opening.
所述褶皱包括当所 述褶皱从所述开口横向延伸时高度逐渐增加的多个褶皱壁。
The pleats comprise a plurality of pleat walls increasing in height as the pleats extend laterally from the opening.
所述褶皱包括当所 述褶皱从所述开口横向延伸时高度逐渐增加的多个褶皱壁。
The pleats comprise a plurality of pleat walls increasing in height as the pleats extend laterally from the opening.
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