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The nominal length on felting needles is expressed in inches and measures the distance from inside the crank to the point.

刺針和標準長度是從針尖至彎柄內側的距離用英寸表示人摸人操人人超碰。

It was crank press slider crank mechanism design that crank press extensive use to blanking,bent,adjustment,mould stamping quiescent. This degree rated for single-point closed type mesotype skill pressure for 160 ton crank press.

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double point：雙重點

double harmonic 雙諧和函數(shù) | double point 雙重點 | double-crank 雙曲柄機構

double-point crank press：雙點曲軸壓力機

double-point breaker 復式斷電器 | double-point crank press 雙點曲軸壓力機 | double-point double-throw switch 雙刀雙擲開關

double-point double-throw switch：雙刀雙擲開關

double-point crank press 雙點曲軸壓力機 | double-point double-throw switch 雙刀雙擲開關 | double-point gear 多點嚙合齒輪