$$T_j=T_a+R_{θJA}⋅P$$
$$R_{θJA}=R_{θJC}+R_{θCH}+R_{θHA}$$
$$T_h=T_a+R_{θHA}⋅P$$
$$T_c=T_h+R_{θCH}⋅P$$
$$T_j=T_c+R_{θJC}⋅P$$
P
[
]
T
a
[
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T
c
[
]
T
j
[
]
T
θJA
[
]
T
θJC
[
]
T
θCH
[
]
T
θHA
[
]