[Effect of noise proof ear plugs for protection of hearing of oil mining workers].
Wu
Shao-ping
SP
Wu
Shao-fen
SF
Liu
Jian
J
D004430:Ear Protective Devices; D005500:Follow-Up Studies; D006317:Hearing Loss, Noise-Induced / Q000517:prevention & control*; D006801:Humans; D008297:Male; D008906:Mining; D009623:Noise, Occupational / Q000517:prevention & control*; D010578:Petroleum; D012189:Retrospective Studies
D010578:Petroleum