想买这个 Broan E64E30SS 30" Stainless Steel Range Hood For External Blower Capabilities With Two 50 Watt Halogen Lights(BLOWER NOT INCLUDED) http://www.ventingdirect.com/broan-e64e30ss-30-stainless-steel- 但是它说的30''是指长度吗?我量了我们家灶台上方的长度(就是原先微波炉hood的长 度),只有29.5''。可以装吗?