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1. narrow, standard´Â ¼·Î ¿¬°á¸øÇÏ°í, doubleÀº °¢°¢¿¡ ¸ðµÎ ¿¬°áÇÒ ¼ö ÀÖ´Ù.
2. narrow, standard°¡ À̾îÁö¸é ¼·Î ¸·Èù±æ·Î º»´Ù.
3. narrow, standard °¢°¢Àº ¾÷±Û½Ã double·Î¸¸ ¾÷±ÛÀÌ µÈ´Ù.
4. double·Î ŸÀϾ÷±Û½Ã ºñ¿ëÀº (·êºÏ¿¡ narrow, standard ¾÷±Ûºñ¿ë¸¸ ÀÖ°í, double´Â full cost¶ó°í¸¸ ½è´õ¶ó±¸¿ä.. narrow, standardÀÇ ÇÕ°èÀÎÁö.. ;;)
a. standard¿Í °°´Ù.
b. narrow+standard ¾÷±Û ºñ¿ëÀ» ³½´Ù.
5. ¿î¿µ½Ã ¿ª»çÀÌ¿¡ double-narrowÀÎ °æ¿ì, ±âÂ÷ °Å¸® °è»ê½Ã
a. ÀüºÎ narrow·Î °è»ê,
b. ½ÃÀÛ¹æÇâÀÌ double¿¡¼ Ãâ¹ßÀ̸é, ¸ðµÎ double·Î °è»ê
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