| 435 / | HD | CHEMISTRY: MOLECULAR BIOLOGY AND MICROBIOLOGY |
| 283.1 | DF | APPARATUS {9} |
| 287.1 | DF | .~ Including measuring or testing {11} |
| 287.5 | ![]() | .~.~ Means for measuring gas pressure or gas volume of gas evolved from or consumed in an enzymatic or microbial reaction |