Any employee, employer or other person who, wilfully and with a malicious intent to hinder the preparation of the United States for defense or war, physically injures or destroys any factory, industrial establishment or public utility engaged in the production of goods, articles or equipment for military use, any machinery contained in any such factory or industrial establishment or any goods, articles or equipment produced or in the process of being produced in such factory or industrial establishment for military use but not delivered shall be guilty of sabotage. The crime of sabotage as defined in this section shall be a felony and any person convicted thereof shall be punished by imprisonment in the State’s Prison for not more than ten years or a fine of not more than ten thousand dollars or both, in the discretion of the court.