Crankshaft is a very important component of large Marine engine and its key part is crank.
船用曲轴是大型船用发动机的重要部件，而曲拐是曲轴的关键部分。
3
The key position bolt of the engine include connecting rod, crankshaft, main bearing, cylinder head, flywheel and shock absorber bolt, all of which belong to bolt fastening.