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5.4.2 A device that is constructed so that the alignment with the existing incandescent luminaire or" y" _+ l( a7 W1 W
portable luminaire requires an adjustment greater than ±20 degrees shall be provided with adjustment of' V2 Q6 i. z; T* x
the device base with relation to the remainder of the device. Examples include:
& z* A0 h! U+ w9 ba) A rectangular-shaped device in which the device is to be parallel with existing walls when0 [) @2 Z2 p/ q: d( l! o
installed in a ceiling surface luminaire, and8 W8 t4 D' X. c0 q
b) A device incorporating a ballast compartment or lamp support arms that will in some cases
9 T1 a5 ?4 u/ F( \. S$ Ehave to be rotated more than 20 degrees to properly clear harps in portable luminaires.\
+ E4 k1 n$ @$ S* @7 ]) Y/ ~; x 同志们 请帮忙解释下上面这段话!
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