Chain slings are suitable for heavy slender articles，such as（）.

Chafing gear（）.

Before welding in a tank that has carried petroleum products，the tank must be certified by （）.

Should the vessel have no deratisation certificate at the time of her delivery，she（）be held to be unseaworthy.

The lines led forward from the bow and aft from the stern when a vessel is moored to the dock are（）.

The smallest size of flaw that can be detected on a radiograph examination of a weld will be indicated by the（）.

At the same time，it is（）for you to signify your acknowledgement of the responsibility for the collision by signing the copies of this letter hereto attached and to return me two copies in due time.

Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from（）.

The annual survey for endorsement of a Load Line Certificate must be held within（）.

The document on a vessel，annually endorsed by an American Bureau of Shipping surveyor，is called the（）.