Inhoudsopgave
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Bijlage D
Toename van de diepte in inches (cm)
Procent
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
88
per 15-ft (4,6-m) boorstang
Dieptetoename
2 (5)
4 (10)
5 (13)
7 (18)
9 (23)
11 (28)
13 (33)
14 (36)
16 (41)
18 (46)
20 (51)
21 (53)
23 (58)
25 (64)
27 (69)
28 (71)
30 (76)
32 (81)
34 (86)
35 (89)
37 (94)
39 (99)
40 (102)
42 (107)
44 (112)
45 (114)
47 (119)
Procent
Dieptetoename
28
49 (124)
29
50 (127)
30
52 (132)
31
53 (135)
32
55 (140)
33
56 (142)
34
58 (147)
35
59 (150)
36
61 (155)
37
62 (157)
38
64 (163)
39
65 (165)
40
67 (170)
41
68 (173)
42
70 (178)
43
71 (180)
44
72 (183)
45
74 (188)
46
75 (191)
47
77 (196)
50
80 (203)
55
87 (221)
60
93 (236)
70
103 (262)
80
112 (284)
90
120 (305)
100
127 (323)
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