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Definition of Hand-hole
1. Noun. ''(Steam Boilers):'' A small hole in a boiler for the insertion of the hand in cleaning, etc. ¹
¹ Source: wiktionary.com
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1. Noun. ''(Steam Boilers):'' A small hole in a boiler for the insertion of the hand in cleaning, etc. ¹
¹ Source: wiktionary.com