Mattress
Hawkins' Electrical Dictionary · 1915 · p. 3
—In hydraulic engineering, a mat woven of brush, poles, ete., used in protecting embankments, forming dykes, jetties, etc.
Bu kavram başka kaynaklarda da geçiyor
A Dictionary of Aviation (1911)
A Military Dictionary and Gazetteer (1881)
A Military Dictionary (1810)
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