20-letter words containing b, u, n, g
- travelling-wave tube — an electronic tube in which an electron beam interacts with a distributed high-frequency magnetic field so that energy is transferred from the beam to the field
- trustee savings bank — a British financial institution which offered savings facilities for small investors and was managed by unpaid trustees. Depositors had no voting rights and no say in financial or managerial matters. The bank is now a public limited company with the same rights and services as other banks and only retains the title in the abbreviated form TSB.
- tubing head pressure — The tubing head pressure is the pressure on the tubing, which is measured at the wellhead.
- under/below strength — If an army or team is under strength or below strength, it does not have all the members that it needs or usually has.