In the section of the Connecting arm should use materials that do not rust, and is strong enough. Instead of using steel SUJ 2 steel SUJ 2 because. Can rust easily make maintenance difficult.
The Connecting arm should choose a material that does not rust and is strong enough. Instead of using steel SUJ2 Because iron SUJ2 Can corrode easily Makes it difficult to maintain
In the part of Connecting arm should select material of rust and strong enough, instead of using the steel SUJ2 due to iron SUJ2 can corrode easily. Make maintenance difficult .