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Seven sizes of Grade A parallels with cross section $9D in x $9H in to 1$9H in x 3 in and nine of Grade B parallels with cross sections $9D in x $9H in to 2 in x 4 in. Material, standard sizes, finish, accuracy, protection and marking.
| Author | BSI |
|---|---|
| Editor | BSI |
| Document type | Standard |
| Format | File |
| Confirmation date | 2017-05-01 |
| EAN ISBN | 0 580 07043 3 |
| ICS | 17.040.30 : Measuring instruments |
| Number of pages | 8 |
| Replace | Replaces BS 906:1940. |
| Year | 1970 |
| Country | United Kingdom |
| Keyword | BS 906:Part 2:1972 |