せん断だん抵てい抗こう角かく

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Meanings

1

angle of shearing resistance

Technical term in soil mechanics and geotechnical engineering; refers to the angle whose tangent is the coefficient of internal friction of a soil.

砂さ質しつ土どのせん断だん抵てい抗こう角かくは、一いっ般ぱんに30度どから40度どの範はん囲いにある。
The angle of shearing resistance of sandy soils is generally in the range of 30 to 40 degrees.