膨凸 的英文怎麼說
中文拼音 [péngtū]
膨凸
英文
bulge-
Developing straegy research industry planning ; project evaluation and project consulting & design in non - metallic minerals such as graphite, kaolin, talc, attapulgite, bentonite, sillimanite gypsum etc
對石墨、高嶺土、雲母、滑石凹凸棒土、膨潤土、硅成石、石膏等非金屬礦發展戰略研究，行業規劃。工程項目評估工程設計，技術咨詢。In the joint of lg pex - a pipe, male xocket is pressed to a convex on the inserting part and the fastening ring will contract to fasten up the heating pipe by the fastening of outer nut, and there is also a convex on the ring to offer close coupling by mechanical re - press effect to prevent water from leaking in case of heat expansion
在lg地熱管中的連接部位不僅閥門管套插入部分的凸起部位被機械作用壓密，而且隨著外部螺母被擰緊，使緊固環收縮，從而帶緊熱炕暖氣管，另外由於存在凸起部位，可通過機械作用進行再次壓密，因此可防止由於熱膨脹而引起漏水。
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