A REFINED DIFFERENTIAL EQUATION OF DISPLACEMENT OF FOURTH ORDER FOR THE AXIAL SYMMETRICAL BENDING PROBLEM OF A CONICAL SHELL AND ITS SOLUTION IN BESSEL FUNCTION是什么意思_A REFINED DIFFERENTIAL EQUATION OF DISPLACEMENT OF FOURTH ORDER FOR THE AXIAL SYMMETRICAL BENDING PROBLEM OF A CONICAL SHELL AND ITS SOLUTION IN BESSEL FUNCTION在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句