* Safety guarantee: 4 times the safety factor

The length difference of the chain limb is denoted by "D", and the unequal length chain is denoted by "B"

-- Chain diameter, mm

-- Number of limbs, in Arabic numerals 1,2,3,4... Indicates. Single limb can omit annotations -

- Chain connection type: welding chain with "H", mechanical connection chain with "J"

- Chain code --

-- Special chain code, the mantis chain, ring chain and metal billet chain are respectively denoted by K, H and P, and the general tank code: L "can be omitted.