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


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

> the cavities with which a block machine could be equipped

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

