A Gravel Gertie has thick reinforced concrete walls and roof, but a large vent in the top to prevent the shell from rupturing in an explosion Below the roof, however, is approximately 7 metres of loosely compressed porous gravel suspended from steel cables above a false ceiling over the work area In the event of an explosion, the mass of gravel is designed to compress and move upwardDisturb, especially by minor irritations 不快感にさせる。 特に小さな苛立ちによって、妨げる。 cover with gravel 砂利を敷く。 be a mystery or bewildering toA gravel kit is a modification on an aircraft to avoid foreign object debris (FOD) damage or ingestion while operating on unpaved surfaces Modifications generally include methods of preventing the nose gear spraying FOD into the engine and onto the underside of the fuselage or wings, and methods of preventing each engine from ingesting FOD from the ground directly in front of it
Pictlet 5 焦らせる 動揺させる を表す英単語 開米のロジック図解入門 実践講座
Pit gravel 意味