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5.4.2 A device that is constructed so that the alignment with the existing incandescent luminaire or3 H }' c+ d5 Z% n- |
portable luminaire requires an adjustment greater than ±20 degrees shall be provided with adjustment of
! R# Q! a- ?, i# _the device base with relation to the remainder of the device. Examples include:
8 X% f# f, e! D5 Za) A rectangular-shaped device in which the device is to be parallel with existing walls when
; i/ A* K3 r" R7 ~- F. Binstalled in a ceiling surface luminaire, and
2 j1 Z. N8 g# x0 ]b) A device incorporating a ballast compartment or lamp support arms that will in some cases
' A3 d3 {' O: r6 W- f. p3 T) W/ ^have to be rotated more than 20 degrees to properly clear harps in portable luminaires.\$ G" u9 D) y" O1 K$ U5 H! g
同志们 请帮忙解释下上面这段话!
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