秒速飞艇2期计划

A process of cutting or forming that is used to generate internal threads in a piece.

A ratio that relates the maximum load of a material to the original cross-sectional area.

Variation from the original specifications of that product that is allowable.

A smaller or sub die that is combined with others and attached to a transfer press that presses pieces that are then transferred to the next die through the use of a mechanical device.

A complex type of press that has several different dies and a transfer mechanism that moves the piece from one die to the next.