Super cache cache lali lali or drop a super woenia (slide vernier or callipera) as shown in the figure is a tool for measuring tasks in detail, the one consisting of a metal ruler (now with the plastic.) that has a fixed PIN at one end and legs other side scroll. The two lower legs using external measures, such as measuring the diameter of the steel wire. Best legs on both internal measures, such as measurement of the internal diameter tube Kaew.
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