[填空题] 铜管宜采用牌号为（）的管材。

点焊必须焊透；点焊处有裂纹、气孔、夹渣缺陷时应铲除重焊，必须在（）合格后方可全面施焊。 A Certificate of Financial Responsibility attests that the vessel（）. ["has financial backing to meet any liability resulting from the discharge of oil","has the minimum required amount of P & I and hull insurance","will assume the responsibility for any damage or loss to the shipper","has financial reserves to meet reasonable expected crew costs of an intended voyage"] 什么是韧皮部装载？ 依照《行政复议法》及其《实施条例》的规定，申请行政复议的公民、法人或者其他组织为（） ["被申请人","申请人","原告","申诉人"] 什么是聚会礼仪？ 铜管宜采用牌号为（）的管材。