10.下列那兩種型式的壓力計是用於測量鍋爐供給空氣及燃燒廢氣較低之壓力？(A)膜片式及U型管壓力計(Diaphragm&U type pressure gauge)(B)波登式及U型管壓力計(Bourdon&U typep ressure gauge)(C)膜片式及波登式壓力計(Diaphragm&Bourdon type pressure gauge)(D)波登式壓力計(Bourdon type pressure gauge)