Through a detailed engineering design , introduced some methods of repairing and reconstruction firs_class conservational building .
通过具体的工程实例，较详细地阐述了一类保护建筑维修加固改造时的一些方法。
Section 1133 makes the agency administering any wilderness area " responsible for preserving the wilderness character of the area " and for insuring that these areas are devoted to " the public purposes of recreational , scenic , scientific , educational , conservational , and historical use " .
