When the addtion amount of the adhesive is 4%, the tensile strength of the sand cores is over 2. 8 MPa and the wet compression strength over 0. 022 MPa.是什么意思_When the addtion amount of the adhesive is 4%, the tensile strength of the sand cores is over 2. 8 MPa and the wet compression strength over 0. 022 MPa.在线翻译_英语_读音_用法_例句