surface stich

[sreenivasan_BH]

hai every body


i have an problem


i am working in casting designing


i have to extract electrodes from core/cavity


some times core/cavity may be exported


in export model all sufaces are not coping at a time


so far i have to copy single surfaces and tom merge it


insted can i merge all surfaces at a time


is there any option


there is no extention in that copied surfaces


thank you