hardness

It`s kind of bitumen which is provided during the process of oxidation of vacuum bottom (the bitumen production feedstock that derives fr...

Class 8.8 bolts are one of the most common structure of hex bolts in the market. they provide acceptable rate of strength and hardness si...

NSK thrust roller bearing رولبرینگ کف گرد that is produced following Japanese industrial standard is a very strong type of roller bearing...

High tensile ball bearing are high carbon steel ball bearings that also have abrasion resistance. these ball bearings are available in di...

concrete washing machine balancing wight with the best qualified material cement and iron ore and the most functional concrete additive...