897、 However, the systems are independent（独立）and there is no fluid exchange between them. 然而，这些系统是独立的，它们之间没有流体交换。

591、No part of this document may be2reproduced in any form without permission in writing from the publisher.

590、Move the tensiometer along the cable.

589、Move the rod in the opposite direction.

588、Move the lever rearward.办

587、most secondary structures are important to the performance of the airplane

586、Most of the switches you use to control the electrical power system are on the electrical system control panel.

585、Mechanical power, is produced by electric motors that are mainly used to drive pumps, for example, fuel and hydraulicpumps or to drive a valve to the commanded position in the fuel, hydraulic or air conditioning system or to move mechanicalparts like doors and cargo containers.

584、Maximum landing gear operating speed is the maximum speed at which the landing gear can be safely extended orretracted

583、Make sure that there is no dust on the surface.

582、make sure that there is no blockage in the pipe