—   —  —  12.4.138-84 . .


12.4.138-84 . .

12.4.138-84 . .

23 1984 . N 928
12.4.138-84
" . . "

Occupational safety standards system. Protective leather shoes. Method for determination of strength decrease coefficient of under parts attachment against elevated temperatures

1 1985 .

- , , ( 200).

.

.

1.

1.1. - 9289-78.

2.

2.1. :

-250 :

- 9134-78,

- 9292-82.

5 ;

40 200.

+- 1.

3.

3.1. - 9134-78.

3.2. - - 9292-82.

3.3. , , 50, 100, 150 200 30 (20 +- 3) 30 .

4.

4.1. - 9134-78, - - 9292-82.

5.

5.1. (_1)

q1
1 = ──,
q2

q1 -

, /;

q2 -

, /.

5.2. (q_1 q_2) - 9134-78.

5.3. - (_2)

q3
2 = ──,
q4

q3 -

, /;

q4 -

, /.

5.4. (q_3 q_4) - 9292-82.

5.5. .

6.

6.1. 12.1.004-91.

6.2. -250 .

6.3. .

6.4. 2 - 3 .

6.5. .

6.6. .




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