2706. Once designed and approved, the establishment of thorough maintenance procedures is a must

It is urgent to establish the thorough maintenance procedure after designed and approved.

Once designed and approved, scheduled maintenance procedures must be built.

Once designed and approved, complete maintenance procedures must be set.

正确答案：C

设备系统操作理论翻译

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657. Before you ( ) the unit, do the specified test procedure

656. When you select terminology or wording, always use a consistent style

655. Back of the title page should be left blank except for items such as a manufacturer’s logo

654. Boost pump is an electrically driven centrifugal pump mounted in the bottom of the fuel tanks in large aircraft

653. 是什么导致的事故仍然是个谜。

652. 通常,发动机被安装在大翼下,可是,对于现代飞机,两个侧发被安装在机身外侧的吊架上。

651. 拆下将变速箱壳连接至发动机的螺栓。

650. To make the curing process slower, decrease the heat that you apply to the compound

649. 确保溶剂没在发动机尾喷管附近。

648. Inspection and modification required from this SB can decrease the possibility of cracks, which may cause replacement of the units