The key shown in the figure below is
नीचे चित्र में दिखाई गई कुंजी है
Lewis
key
Kennedy key
Pin
key
Barth
key
Barth
key
●This
is a Barth key which is a square key with two corners beveled.
●The
beveled corner ensures tight fitting and decreasing the tendency to twist when
driving in either direction.
●There
is a small clearance to permit easy removal and assembly.
Hence,
the correct option is (D).
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