| 摘要 |
1441611 Protecting underwater surfaces B KIRKSAETER and O RASMUSSEN 31 Oct 1973 [19 Dec 1972] 02455/76 Divided out of 1439773 Addition to 1336103 Headings B7S and B7M In a method of protecting a ship's hull as claimed in any one of claims 1 to 3 of Specification 1,336,103, the nature, thickness and method of application of the covering wax layer renders it durable enough to promise protection of the underlying coating during general service of the ship for at least one year. |
