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Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Roller Body: 50 manganese steel with good hardenability is used. After quenching and tempering treatment and medium frequency induction quenching, its strength and wear resistance are guaranteed.

Supporting wheel is one of the four wheels of excavator and bulldozer chassis. Its main function is to support the weight of excavator and bulldozer and let the track move along the wheel.