Detailed Product Description

the hydraulic valve 

 has lift,stop,drop 

of control handle and 

slowly-fall controlling switch .

the handle can coorperate

 with air controlled 

revesing valve to achieve 

dump truck`s lift,stop,drop 

and fall slowly.the hydraulic

 valve 

still has self-locking function.

Importantly,

the transposition 

clearly and definitely.