poling-board method

poling-board method
\\ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷-\ noun
: a method of excavation (as of wells or trenches) by digging sections of from four to five feet each in depth with each section being sheathed with poling boards as it is finished

Useful english dictionary. 2012.

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