Based on STEP standard and IDEF method,function model of product model information and its structureswith three layers (i. e. function layer,generic part layer,generic structure layer) are built.是什么意思_Based on STEP standard and IDEF method,function model of product model information and its structureswith three layers (i. e. function layer,generic part layer,generic structure layer) are built.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句