Standard Specification for
Vitrified Clay Filter Blocks1
This general is issued beneath the constant designation c 159; the range without delay following the designation indicates the 12 months of
authentic adoption or, inside the case of revision, the yr of final revision. a number in parentheses indicates the yr of ultimate reapproval. a
superscript epsilon (e) suggests an editorial change because the remaining revision or reapproval.
This general has been authorised to be used by using businesses of the department of defense.
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