These are ISO 10427
API Specification 10D 6th Ed. Mar. 2002 - Specification for Bow-Spring Casing Centralizers - ISO 10427-1;2001.pdf
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API RP 10F 3rd Ed. Apr. 2002 - Recommended Practice for Performance Testing of Cementing Float Equipment - ISO 10427-3;2003 (ISO 18165)
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