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When the portable luminaire has a flexible or articulated arm, the arm is to be bent before the* q( M8 A/ y+ x$ k9 G; W1 o
lamp is placed on the inclined plane, starting at the lower end of the arm, to form a quarter circle that a- u9 E# C$ J1 C2 |8 _9 ~
line joining the ends of the arm make an angle of 45 degrees with the horizontal. When a flexible or1 l9 h: c3 n/ N7 \7 _1 \
articulated arm is off-center with respect to the base, the arm is to be bent in the direction that results in
8 E3 {: H# h( t- X% }" n4 atip over. When the unit has more than one flexible or articulated arm, one of the arms is to be adjusted2 N% j0 I6 @/ M6 O
as for a unit having a single arm, and the other arm or arms are to be extended vertically.+ d U# j- G. o- L7 s
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英文不好,如图示灯怎么操作呢
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