请问硫酸酊氨卡钠的作用机理？

Active Ingredients:
Sulfate Apramycin; Sulfate Amikacin
Actions:
Broad-spectrum, antibiotic with bactericidal action. Indicated for treatment of infections of the digestive tract, hematosepsis, and infections of respiratory tract caused by colibacteriosis, salmonellosis and pasteurellosis in calves, pigs, lambs, rabbits and hens etc.
Dosage and Administration:It is administrated for 2—3days in drinking water, at the rate of 120 milligrams (one vial) in 150kg water, twice a day
For animal: It is administrated for 2-3 days in drinking water at the rate of 2-3 milligrams per 10 kilogram of body weight, twice a day
Package:120ml/vial
Storage tore in a cool place away from light
Withdrawing time:
Do not slaughter treated poultry or animal