haoyunh69 كتب:

Pipe rubber expansion joint is necessary in systems that convey high temperature commodities such as steam or exhaust gases, or to absorb movement and vibration. A typical type of expansion joint for pipe systems is a bellows which can be manufactured from metal (most commonly stainless steel), plastic (such as PTFE), or an elastomer such as rubber. A bellows is made up of a series of one or more convolutions, with the shape of the convolution designed to withstand the internal pressures of the pipe, but flexible enough to accept the axial, lateral, and/or angular deflections. Expansion joints are also designed for other criteria, such as noise absorption, anti-vibration, earthquake movement, and building settlement.

muatasim كتب:

يسلمو يا زاهيه - عساك دوم بالقمه تزهين

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بس ويش سالفة الأنابيب المطاطية - ما فهمت

الأماني كتب:

زاهية بنت البحر

أُسجِل إعجابي هنا بما قرأت لكِ
حظورك باذخاً رقةً وعُذُوبة
وإني لأعجبُ من عابر مر على هذهِ الرائعة ولم يتمعن في جمالها وروعتها
ولكِ مني أصدق الأماني