oil-canning
plural of sit bone
Aloneness; the state of being alone, solitary, or by oneself. / A lonely or deserted place.
(roofing) A moderate deformation or buckling of sheet material, particularly common with flat sheet metal surfaces.
confliction
点検の際、技術者は平らな屋根の数か所で板金のたわみを発見し、こうした変形は薄い板金によく見られるものだと指摘しました。
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