direct method electric tracing
...nal steam tracing 蒸汽夹套伴热 steam-jacket tracing 电伴热 electric tracing 直接法电伴热 direct method electric tracing 中间法电伴热 intermediate method electric tracing 间接法电伴热 indirect method electric tracing 热流体伴热(热载体伴热) h...
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