precision n. 精密,精确性;严格;精密度;【修辞学】精确。 arms of precision 装有瞄准仪的枪炮。 adj. 精确的,精密的。 precision apparatus 精密仪器。 a precision balance 精密天平。 a precision fire 准确射击。
Abstract : in this paper , a kind of technological scheme for one - step precision forging spur gear with large module is put forward by using positive friction role . experiment , in which commercial pure lead is taken as test material , is done in the special die designed , and force vs . stroke curve is recorded . it is shown that positive friction role can efficiently make a contribution to the filling of the tooth cavity , but increase forming force 文摘:针对大模数直齿圆柱齿轮,提出了利用积极摩擦一步成形的工艺方案,并用工业纯铅作为试验材料,在设计的专用模具上进行试验,记录了力? ?行程曲线,结果表明:利用积极摩擦作用能够有效地保证直齿圆柱齿轮精锻时齿腔充满,但同时增加了变形力。