A.泵艙應(yīng)設(shè)有雙層底且泵艙底和基線之間距離h不小于h/15（m）或h=2m，取小者
B.如果泵艙的底板高出基線至少達(dá)所要求的最小高度，則泵艙處不需要雙層底構(gòu)造
C.壓載水泵應(yīng)予合適布置，確保有效地從雙層底艙中抽水
D.無(wú)任何要求，不必設(shè)置雙層底

A.The location and extent of application of different grades and strengths of materials.
B.The approved and available welding procedure adopted in the construction
C.Restrictions or prohibitions of repairing or modification
D.None of them