What is the stem of "Sherman M 1 tank, firing rate is 350 rounds per minute"

Sherman M 1 belongs to Mengfu at sea. Meng, the protagonist in the play, asked the soldiers of the national army in the lecture: "What was the name of the most famous tank in Germany during World War I?" At this time, a student replied: "Report-Sherman!" To the surprise of the audience, the protagonist actually expressed his approval and added that the full name was "Sherman M 1". Then, the protagonist added a series of strange performance data about this "Sherman M 1": "Self-weight is 56 tons, firing rate is 350 rounds per minute, armor piercing, blasting and burning can be completed in an instant, and it is a hero in the chariot."

This terrier is laughing at the lack of common sense and exaggeration in this play. Sherman and M 1 are both American models, and the maximum bomb load of German tanks in World War I was 30 tons. The firing rate of 350 rounds is even unimaginable. Modern tanks use automatic loading, which is about 10 rounds.