外表长得一样,但里面不一样 f. S( L, j3 q. x3 ^5 Q R. y# @
' U) u, G$ g" I9 q( Z2 U. n
one stage T-STAT has "w" wire terminal: ^' |$ V& x2 q
two stage T-STAT has "w1" and "w2" wire terminal & y+ M* c$ j! Q' e/ T6 z- ?4 s4 g ' [' L [& B. ]* B: C6 b1 J2 I0 H3 ~, \! H) f
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