1. Type A,E,K,L for the junks washover. 2. Type C,F,H,G for mending the top ... . Type B,D,I,J,F,G,M,N for hard stratum Description:It is a kind of washover tool, which ... use type it can be divided into:1. Type A,E,K,L for the junks washover.2. Type ... C,F,H,G for mending the top fish O.D.3. Type ... B,D,I,J,F,G,M,N for hard stratum washover or stabilizers washover ...