你可能感興趣的試題

單項(xiàng)選擇題

A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a （）.

A.poor fix
B.good fix
C.poor signal quality
D.good signal quality

單項(xiàng)選擇題

A list signal of one white light indicates that the vessel is （）.

A.on an even keel
B.listing about 1° to the side the light is displayed on
C.listing over 5° With the light displayed on the high side
D.listing，and the chutes should be directed to the side where the light is displayed

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A low pressure annular preventer which is used to direct flow of kick fluids away from the rig floor is called a （）.

你可能感興趣的試題

A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a （）.

A list signal of one white light indicates that the vessel is （）.

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