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石墨润滑剂 shímò rùnhuájì
auto. black-lead lubricant
met. graphite lubricant; graphitic lubricant; oildag
tech. black lead lubrication; oil dag
石墨润滑剂: 7 phrases in 5 subjects
General2
Metallurgy2
Oil / petroleum1
Shipbuilding1
Technology1