Kèo nhà cái˳ȥľſ˵סǽԭһ쿪ʼҾūľ棬Ҫƺңٽ߰ɡѾ嵽ӪկǰһʿһͷȲúõɲǼ䵹һƬӪկоȻû˳ûмЦһΨһʤĻᣬôװ˷ѵĵʱҲ䳹ʧʱˣӣ˻Уܴŵķȥķ˿Ҳǵоٵķ
ͷϣͻȻһЦѻȻһУһ˴֮£˭磬ҾӦľͥҲһʱˣʱóˡȸͷ·ûзŹ˵ľȣһתλˣŴŴҪЩֻԼңҪңŴ˲
̬Ѿūʱ⽨ʱݡǹֹߵij֣ѾǵһҪأٳΪͷȴµ£ͳȻȥһЩ֮ϵĶ緱١ռ£Ȼô䡣ɨһڵҡͷʧЦʵһ֤һһȻͷԲѣżڼ߳Ӫʣڼǰ۱ĺͣĺ;һЩ㽫ҪĻͻ֡
ϲIJ£ʱʱͷ쾭һսڿͷʱ¾ȸ±ܡȥֹͻĽݫذϼ۾һսսʱָʱɾ͡Ǿ㣬10Wɾ͵100W츳˺սʱսսʿ20%һdzɳһΣͬʱһ棬ɽκһ£ýʣһһǣüŹ˲Ǹ֮ˣˣҪңŬҪЩֻǰܶһ죬Ҫҹ·սʿǵľѾﵽһdzĵز˿ͻȻʹϺҹкѿ˧죬IJϽ֮£ûΪŬӻҡ