portable screen for slag recovery metal
Harder Than Hard mode is a Difficulty Level not even supposed to be fair, and the developers make this clear by warning the player. To qualify for this trope, a difficulty level needs to be above an existing "hard" difficulty, then explicitly indicate that it was not adequately play-tested, or might be unwinnable at that setting, or some blood-curdling warning along the lines of "don't play this"
Onte Machinery is an enterprise specializing in the production of
various crushing, sand making, grinding, mineral processing
and building materials products. After 40 years of development,
it has become the production and export base of China's mining machinery industry.