90 narrow side flat frame double inward opening concealed drainag
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90 narrow side flat frame double inward opening concealed drainage system window
The vertical hidden drainage design of the profile itself prevents rainwater from backflowing and sedimentation, and the drainage is smooth and not blocked.
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200 meters south of the intersection of Yuquan Road and Wenquan Road, Jiehu Subdistrict, Yinan County, Linyi City, Shandong Province
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