短語詞組短語principal plastic strain 塑性主應變principal shearing strain 主切應變Principal of strain 應變主軸principal normal strain 主正應變principal shear strain [力]主剪應變maximum principal shear strain 最大主剪應變principal tensile strain 主張應direction of principal strain 主應變方向principal plane of strain 主應變面 返回 principal strain