Safe Operation of Vacuum Trucks in Petroleum Service
Selection and safe operation of the vacuum truck, vacuum pump, hoses and .....
Required When the Suction Hose is Partially Submerged (Skimming) ... For
example, a hot surface or material can cause thermal skin burns or a corrosive.
The tweezers themselves are good, but the motor vacuum to it is weak, i had to disassemble and bend the tongue to the transformer, it became less, but still medium, mouth discharge turns out to make twice better and then the tweezers holds confidently, you need to refine.
package delivered -ok, quickly delivered, I recommend the seller, thank you