BS 1421:1947被替代
Picks, beater picks and mattocks
出版：British Standards Institution
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基本信息
标准编号： BS 1421:1947
发布时间：1947/12/18 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：16
标准简介
Eight implements in 28 weights and sizes comprising: navvy picks with chisel and point, and double point ends; beater picks with point and fish-tail, and point and tee ends; mattocks with point and mattock, cutter and mattock, and chisel and axe ends. Dimensions of eyes and implements; quality and hardness of steel: tolerances on dimensions and tests. Requirements for helves.
标准备注
© British Standards Institution 2013
Amendment notes:
PD 865 published 15 December 1948
AMD 1316 published 15 February 1974
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