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环形物
gen. annulation; cirque; dount; girdle; roundabout
dril. doughnut
el. ring
wind. annulus
戒指,耳环,鼻圈,镯子等环形物
gen. ring
环形物: 11 phrases in 8 subjects
Automobiles1
General1
Hydroelectric power stations1
Metallurgy1
Plastics2
Technology1
Textile industry3
United Nations1