... ,in cable trench or direct buried,able to bear external mechanical forces,but unable to bear large pulling force ... ,in tunnels,cable trench,well or direct buried,able to bear external mechanical forces and determinate pulling force.VLV32Aluminum ... as jacket material (like welding cable, waterproof submersible pump cable ,H07RN-F cable)*Overhead cable /aerial cable(copper /alnuminum as conductor) rated ...