Точные бурильные штылки.
The use of wood mold or lost foam requires the mold to be consistent with the real thing, the appearance is smooth, and the yield and surface finish of the casting are improved, so as to reduce flash, burr and cold separation.
Content introduction
Problem: pump does not water, pressure gauge and true empty meter pointer beat violently.
Problem: pump does not water, pressure gauge and true empty meter pointer beat violently.