Chalk line marking device

作者： Tim I. Noyes

DOI:

关键词: Mining engineering 、 Geotechnical engineering 、 Chalk line 、 Engineering 、 Line (geometry)

摘要: A carpenter' chalk marking device for producing marks at regular intervals along a straight line upon working surface, characterized by units mounted and configured to hold the from contact with surface prevent extraneous marks. The also includes containing canister storage spool line.