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It is identified that PVC expanded pipe with screw-thread inwall can lower the noise for 5 to 7 Db than PVC expanded pipe, and 10 -15 Db than solid wall PVC pipe, and it is the most idea drain pipe fro building up to now.

据鉴定，扩大聚氯乙烯管螺纹内壁可降低噪声5至7分贝，比聚氯乙烯扩管 10-15分贝，比固墙PVC管、而且也是最排水管穿梭建设构想到现在。

Company's products mainly include: all kinds of nylon cable ties, positioning chip, security-type isobar hat, pin-line card, Pipe, cable screw joints, all kinds of electronics such as plastic attachment.

公司产品主要包括：各种尼龙扎带、定位片、安全型压线帽、钢钉线卡、缠绕管、电缆螺旋接头、各种电子类塑料附件等。

Is a professional manufacturer of wiring attachment businesses, products mainly include: all kinds of nylon cable ties, positioning chip, security-type isobar hat, pin-line card, Pipe, cable screw connectors, all kinds of electronics such as plastic attachment.

上海博诚实业有限公司是一家专业生产配线附件的企业，产品主要包括：各种尼龙扎带、定位片、安全型压线帽、钢钉线卡、缠绕管、电缆螺旋接头、各种电子类塑料附件等。

A mathematical model of PPSA for single screw extruder has been established based on the assumptions of power law fluid and isothermal process.

以材料学和单螺杆挤出理论为基础，研制了单螺杆并联式稳压装置。

Based on the screw theory and the vector product, a modified method for solving Jacobian matrix is proposed in this paper.

基于旋量理论和矢量积法，本文提出了求解雅可比矩阵的改进方法。

At last, the square Jacobian matrix of low-DOF serial robot is established using screw theory, and the condition of existing singularity is solved on this basis.

最后，应用螺旋理论的方法构建了少自由度串联机器人的雅克比方阵，并在此基础上求解了机构奇异位形存在的条件。

And Jaeger couldn't screw up.

而Jaeger可不能搞砸。

B. Fix the door jamb screw into the base with M4 hex wrench.

B。 用M4六角扳手，把门套页面螺杆旋入门套的孔内。

When you make a promise, keep it. When you screw up, admit it.

诚实可靠是一切成功的基础。

If not use some keys, only unplug the keyboard (Note Unplug the keyboard interface, when the arrow tips or TOP, in order to plug back); inverted keyboard, twisted wire under the screw, open the keyboard; use of alcohol and scrub the following keyboard keys keycap contact part.

如果还有些键不太好用，只有拔下键盘（注意拔下时键盘接口的箭头或TOP提示，以便插回）；反转键盘，拧下螺丝丝，打开键盘；使用酒精擦洗键盘按键下面与键帽接触的部分。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。