Wait for an hour, then install the rubber tube on the air outlet.
The rubber made from animal glue, animal skin fragments, and chemicals worries him greatly in terms of quality.
However, the tires and footballs made using them are still passable in quality.
He first uses a hot metal pipe to heat the opening of the rubber tube, making it soft.
Then he fits it onto the air outlet and waits for it to cool down.
Next, he wraps several rounds of iron wire tightly to ensure the rubber tube cannot fall off.
Using the same method, he connects the rubber tube with the metal block at the front.
The syringe in front of the metal block, the surrounding tubes, and gaskets were made quite standard; he tested it against the tire valve core.
It took enormous effort to install the pump.
Testing the pump, he feels it's fairly usable.
He can produce one pump a day, and he doesn't know how to evaluate this work efficiency.
