发布时间:2025-01-31 12:54:23
Φ=∧AΔT/Δ
式中:
Φ--单位时间内通过平壁的热量(W);
A--平壁面积(`M^2`);
∧--物体的热导率[W/(M·K)]
Δ--物体的厚度(M);
ΔT--平壁两表面之间的温度差(K)
杭州地区的二手房交易网签合同备案后房东还能拿去抵押登记吗房本还在房东身上
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