Briefly describe the international standards for work shoes

1. European Common Market Safety Standards (EN344.1:1992)  According to the testing methods and specifications of this standard, safety shoes can be divided into 3 types:   .EN345.1:1992: Safety shoes for professional use, with a steel plate built into the toe , Can prevent an impact equal to 200 joules (J).  .EN346.1:1992: Professional-use protective shoes, with a…