D: Plastics screw thread (as per sample).
D：塑料丝扣(见样品)。
Top view of square head set screw. Selection box represents thread diameter.
方头螺钉的俯视图。选择框代表螺纹直径。
Side view of wing screw with adjustable thread length.
螺纹长度可调整的翼形螺钉的侧面图。
这只螺丝的螺纹磨损掉了。
Their quantitative relation is set up in the same screw thread.
从而建立了同一普通螺纹中两者之间的定量关系式；
Screw , a thread of the nail, for fixed something to another thing …
螺钉，有螺纹的钉子，用于固定某物到另一物…
Side view of Roundhead screw with adjustable thread length.
螺纹长度可调整的圆头螺钉的侧面图。
不锈钢螺丝线；
The holding ring and the secondary holing ring are connected through a screw thread.
扣押环与二次扣押环通过螺纹连接。
The holding ring and the secondary holing ring are connected through a screw thread.
扣押环与二次扣押环通过螺纹连接。
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