Answer :
Final answer:
Type O, Type N, and Type M are ASTM standards associated with construction materials. Type O is for specific building materials, Type N is for masonry units, and Type M is for certain types of mortar.
Explanation:
The ASTP standards classified as Type O, Type N, and Type M are respective standards set for particular constructions materials. Type O is often associated with specific materials used in building construction, Type N is for standard specification for masonry units, and Type M is associated with specific types of mortar for masonry.
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