94
( )
.
.
:
(a) .1
.
.
. .2
.
.
♦ .
♦ 150
.
♦
.
.
♦ ( )
.
♦ .
♦
.
♦
.
♦
.
(25 2 1 )
(e) .1
. (t)
0° .2
.(e)
.(c v) .3
(dd) (a) .4
.
. (l) .5
.6
.(s)
.7
.
(26 2 1 )
(e) .1
. .(t)
0°
.2
.45° 31.6° 22.5° 15°
52°
.(e)
. .3
. .4
:
- :
.
(27 2 1 )
45°
0°
.
45°
(k) .1
(v)
(p) .
.
. (p) .2
. .3
.
(60 )
(80-120 )
.
:
.
.
.
.
(20 )
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