### Question
How is the "block machine" defined?


### Answer
The term **block machine** is defined in *15 U.S.C. § 8702* as follows -

> a piece of equipment that utilizes vibration and compaction to form concrete masonry products

#### Citation:
  - *15 U.S.C. § 8702*
  - Heading: **CHAPTER 113-CONCRETE MASONRY PRODUCTS RESEARCH, EDUCATION, AND PROMOTION**

