The goods which do not pass through the territory by land but call for a change of the means of transport at a place with a Customs establishment is defined as ______.

A．transit goods

B．transhipment goods

C．through goods

D．import and export

与立式锅壳锅炉相比，卧式锅壳锅炉的水容量大，因此蒸汽压力受外界变化的影响较小。内部结构也便于检修和清洗。因受占地面积等因素的限制，单炉胆锅炉额定蒸发量一般小于（）。

A.5t/h

B.8t/h

C.16t/h

D.32t/h