Tỷ lệ kèo nhà cáiɽɽһ֧ɽۼӺӳūսʿκ̾һһ֮У˵ʬһ˵ٽ±֪κԽ˽½ʬͻسɳϼˡ֮ǰijɼ֮ǰǷѾһЩ˳ɼȫһ̡
ɱʲôľһĵ˼һۣ˵һûᣬߣȥΪʱͥ֡ʿụ̃бЩ˵ĵλʿ˵ĵλͻήֹͣˣѾ÷ҡīңδҪְټ־СȴҲبδУߴһٲͳȻ˵ȴ˸˷֮ɫ
ֵСԲЦк˵ĽݫһŤͷŽ졣λѾõȷϢͷѾľ棬ΪԸǡ±ܳ
ɱˣū֮ĸ䣩ͨϽһ̡ϲIJ£ʱʱͷ쾭һսڿͷʱ¾ȸ±ܡȥֹͻĽݫذϼ۾һսսʱָʱɾ͡Ǿ㣬10Wɾ͵100W츳˺սʱսսʿ20%һdzɳһΣͬʱһ棬ɽκһ£ýʣһһǣŤͷһ۸õķЦһԭκεطܵ͵ˣµĹԱ϶dzԺţĸ£쳣ӵЩӵܣ߱ʵʸ