17.Though knowing that there was misunderstanding between them,he,then wilful and self-opinioned of that young age,resolved to be gone forever when they broke up.
19.Through the reduction of friction force and deformation force between the steel wire and die,the tensile failure problem of steel wire workblank during the stamping process was resolved.
20.The synthetic medium of optical N acylalanines was N (2,6 xylyl) alanine.It was reacted with 1 menthol and prepared into its menthol esters which were purified by TLC, resolved and determined by HPLC.