A—assembly lineJ—safety bootsB—packerK—shipping clerkC—forkliftL—time cardD—explosive mate

A—assembly line

J—safety boots

B—packer

K—shipping clerk

C—forklift

L—time card

D—explosive materials

M—warehouse

E—fire extinguisher

N—hard hat

F—loading dock

O—earplug

G—machine operator

P—hand truck

H—electrical hazard

Q—safety earmuffs

I—conveyor belt

Examples： (F)装载码头 (K)运务员

51.()易爆材料 ()安全耳罩

52.()]二时卡 ()安全靴

53.()装配线 ()灭火器

54.()安全帽 ()手推车

55.()机器操作员 ()输送带

请帮忙给出正确答案和分析，谢谢！