stumper n.— «First, what the loggers call a stumper uses its arm to chop down some trees. The first batch of trees, from the start line to the edge of the property line, are laid across the swamp. The stumper’s large, tank-like track...
whisper grinding n.— «Caltrans instead is considering a technique called “whisper grinding” to make the concrete on I-5 quieter.» —“Green approach produces quiet streets” by Dave Downey North County...