相关题目
56. *() is the ladder provided at survival craft embarkation stations to permit safe access to survival craft after launching.
55. *The appliance shall be so constructed that the end from which the rocket is () can be positively identified by day or night.
54. *Every line-throwing appliance shall be capable of throwing a line of no less than 4 mm in diameter for a distance of () in calm weather.
53. *Each () needs to be regularly checked and maintained properly in order to be ready for use all the time.
52. () is a protective suit which reduces the body heat loss of a person wearing it in cold water.
51. *Every lifebuoy shall be of a () colour.
50. *The lifebuoy intended to operate the quick release arrangement provided for the self-activated smoke signals and self-igniting lights, have a mass of not less than () kg.
49. Every lifebuoy shall be fitted with grab lines and well secured at () providing four loops of line.
48. *The device on above picture is ().
47. *An immersion suit must be equipped with a( ) ().
