外表长得一样,但里面不一样1 D( P. t+ h8 d/ Y7 i8 c8 m+ p
0 {3 H+ N: a) f0 a
one stage T-STAT has "w" wire terminal # j5 L7 O* h l. f' q- y& stwo stage T-STAT has "w1" and "w2" wire terminal ' M7 |0 C0 ~6 b* h; V+ m- r' X/ A9 j
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