外表长得一样,但里面不一样0 U: Z3 Q( l( M
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one stage T-STAT has "w" wire terminal; m Y" [ E3 j
two stage T-STAT has "w1" and "w2" wire terminal* a. W2 x0 I4 c' l. H
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: a0 ]8 F9 F. ^* @
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