Rock drilling; Hollow hexagonal drill-steels in bar form
Описание (англ.):
This second edition cancels and replaces the first edition (1974). Lays down the dimensions for drill-steels which shall comply with the figure and the two tables (dimensions given in millimetres and inches, respectively). Includes nominal sizes from 19 to 25 mm and from 3/4 to 1 inch.
Заменён стандартами:
ISO 722(1991.02)
Дата введения:
01.10.85
Дата отмены:
01.02.91
Нормативные ссылки:
DIN 20377-1979, EQV*NF M81-105-1973, NEQ
Ключевые слова:
BORE BITS BORING EQUIPMENT (EARTHWORKS) DIMENSIONS DRILLING BITS DRILLING EQUIPMENT HEXAGONAL BARS HOLLOW PROFILES HOLLOW SECTIONS MINING EQUIPMENT POLES ROCK DRILLS SOUNDING EQUIPMENT METAL SECTIONS