... ) 3.API Spec 8C Standard The main body of DD(TA) elevator is made of high-strength alloy steel, ... and equipped with the safety device of spring valve. The DD(TA) elevator is reasonable in design, convenient in operation and ... reliable in safety.The DD(TA) type elevator is a lifting tool utilized in the ... .72103.58117×123 /4.1/2 EU123.42116.66 DD(TA) Elevator