โซ่อุตสาหกรรม P.I.V Roller Chains br br P.I.V. Roller Chains is Positively Infinitely Variable Roller Chain. In addition to the long service life of the chain, this also achieves very smooth operation of the transmission and favourable material stressing. br * All Steel Chains br * Through Hardened br * High Performance br โซ่เพื่อใช้ในงานอุตสาหกรรม br โซ่ PIV.