Ventilators in position 1 shall have coamings of a height of at least ( )above the deck,in position 2 the coamings shall be of a height at least( )
A.900mm B.850毫米 C.800毫米 D.760毫米正确答案AD
Ventilators in position 1 shall have coamings of a height of at least ( )above the deck,in position 2 the coamings shall be of a height at least( )
A.900mm B.850毫米 C.800毫米 D.760毫米正确答案AD