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汉语拼音：luó wén

1.手指上的纹理，也指脚趾上的纹理。也作罗纹。

2.机件的外表面或内孔表面上制成的螺旋线形的凸棱。也叫螺丝扣。

1. 手指或脚趾上的纹理。

   宋 苏轼 《东坡志林·赤壁洞穴》：“岸多细石，往往有温莹如玉者，深浅红黄之色，或细纹如人手指螺纹也。” 清 王士禛 《池北偶谈·谈艺三·御画牛》：“恭覩 世祖皇帝 画渡水牛，乃赫蹏纸上用指上螺纹印成之。意态生动，笔墨烘染所不能到。” 张天翼 《包氏父子》：“那本记菜账的簿子上打着一个个黑的螺纹印。”

2. 螺旋形的纹理。

   清 阎尔梅 《宿白厓寺》诗：“碎磯填鸟道，环水带螺纹。”

3. 机件的外表面或内孔表面上制成的螺旋线形的凸棱。根据旋转方向分左螺纹和右螺纹两种。也叫螺丝扣。

   《花城》1981年第3期：“那车刀在工件上飞速转动，在长长的圆钢上刻出一道道的螺纹。”

• The screw threads will be able to get a good grip.

  螺纹能牢牢地咬合卡紧。

• If grooves are cut in the flank of nut hydrostatic action is possible.

  如在螺母螺纹侧面切槽,则可实现静压作用.

• Material nonlinear and contact problem in connecting threads are considered in formulation.

  计算中考虑了材料的非线性问题和螺纹间的接触问题.

• Apply pipe dope sparingly on pipe threads, never on valve threads.

  在管道螺纹上涂敷螺纹油, 但是不要在阀门螺纹上涂螺纹油.

• Screw hollow and motor spindle are distributed staggered and equally.

  螺纹安装孔的位置与电装电机轴线成错开对称分布.

• Threaded or butt - weld end valves may be quoted on application.

  可以根据要求提供螺纹或对焊端口阀门的报价.

• Leave enough space to keep the supply tube from being jammed.

  尽可能长的预留供水接入的螺纹管免移机长度—够.

• Non - rising - inside screw stems are used in bronze and iron gate valves.

  暗杆 - 内螺纹结构用于青铜和铸铁闸阀.

• Tapered pipe threads produce radial stress in female fittings.

  锥管螺纹在内螺纹内会产生径向应力.

• Lamp is tightened with thread having high explosion protection performance.

  灯体采用螺纹紧固,防爆性能好.

• Rectangle - shape side gate and the gear - rack taking off thread mechanism were used.

  采用矩形侧浇口、齿轮齿条脱螺纹机构.

• Stub acme thread on stem provides rapid open - close operation.

  阀杆上的短梯形螺纹适用于快速启闭操作.

• It is connected with - 12 aluminum pipe and vertical wrapped cable.

  内外导体双螺纹锁紧.配接-12铝管及纵包电缆.

• Side view of panhead posidriv screw with adjustable thread length.

  螺纹长度可调整的平头十字槽螺钉的侧面图.

• This connection has a right - hand thread ( loosens counterclockwise ).

  这种接头有右手螺纹 ( 逆时针方向松开 ).