[A mouthpiece for endoscopic pH measurement].
Suvorov
A M
AM
Dubovtseva
E F
EF
D004867:Equipment Design; D005745:Gastric Acidity Determination / Q000295:instrumentation*; D020699:Gastroscopes; D006801:Humans
Zagubnik dlia éndoskopicheskoĭ pH-metrii.