代北地区泛指汉朝、晋朝时期和唐朝以后的代州以北的地区。
本文对大庆杏北地区以煤代油集中供热工程设计的方案特点及所采取的一些主要节能措施进行了论述；
This paper states the design scheme characteristics of concentration heat - supply engineering replacing oil with coal in Xingbei district of Daqing city and its energy - saving measurements.
结论豫北地区相对老一代较新的抗生素仍有应用价值。
Conclusion The newer antibiotics are valuable yet in north Henan area.
新生代地堑构造是华北地区最普遍和最有特征的构造。
Cenozoic graben structure is the most general and characteristic tectonic in North China.
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