55
M
M
M
M
A
A
A
A
N
N
N
N
U
U
U
U
A
A
A
A
L
L
L
L
U
U
U
U
S
S
S
S
E
E
E
E
A
A
A
A
N
N
N
N
D
D
D
D
M
M
M
M
A
A
A
A
II
II
N
N
N
N
T
T
T
T
E
E
E
E
N
N
N
N
A
A
A
A
N
N
N
N
C
C
C
C
E
E
E
E
M
INIDUMPER MODEL
HP 1100
PHOTO N. 4
BREAKING OF ENGRAVED
THREAD BASE CAUSED
BY RUBBER BENDING
(CURVING) UNDER
PRESSURE
PHOTO N. 5
BREAKING OF TYRE
OUTER PART
UNDERNEATH STEEL
CORE EDGE
PHOTO N. 6
BREAKING OF TYRE
INNER PART ON THE
STEEL CORE SIDE