890、 For simplicity of presentation and understandability, complex systems should be divided into systemfunction rather than overall master wiring diagrams Interconnects to other systems should be plainly noted. 为了表示和理解的简单性，复杂的系统应该被划分为系统功能而不是整体的主接线图，与其他系统的互连应该被清楚地标记出来

598、Open, safety and tag these circuit breakers.

597、Open this circuit breaker.

596、Open communication should exist with the operator telling the manufacturer as soon as some new kind of situation arisesand the manufacturer responding back with solid help to the operator.

595 、Open communication should exist with the operator telling the manufacturer as soon as some new kind of situationarises and the manufacturer responding back with solid help to the operators

594、One generator can supply power for all the]systems

593、On pages requiring folding, make the fold in a manner that permits the page number to be visible.

592、0bey local regulations for the correct procedures to use or discard solvents.

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.