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| Russian | English |
| масса крыши | mass of roof (The weight of the floating roof. The pressure created by the floating roof sitting on the product is subtracted from the bottom pressure transmitter (P B ) by the HIU Метран) |
| масса пара | vapor mass (The mass of the vapor in the vapor space. Calculated by the HIU (or SAM) using V constants Метран) |
| образование канала в массе материала | rathole (A hole formed in the center of a bin of dry solid material. Often occurs with fine powders where air becomes entrapped and the wall friction causes the material to be trapped as dead space. Ratholing can cause periods of no flow conditions or uncontrolled flooding Метран) |