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垂球
gen. bob
agric. plumb-bob
bridg.constr. plumb bulb; plummet
hydroel.st. plumb bob; plumment
tech. lead plummet; right sphere
垂〔铅〕球
gen. plumb bob
垂球: 40 phrases in 8 subjects
Aviation1
Billiards1
Bridge construction1
Earth sciences1
Oil / petroleum1
Table tennis1
Technology33
Tennis1