Şunu aradınız:: konċentriċi (Maltaca - İngilizce)

kondensatur magħmul minn żewġ tubi konċentriċi tar-ram tat-tip użat fit-tagħmir ta’ refriġerazzjoni
condenser composed of two concentric copper tubes of the kind used in refrigeration equipment

prodotti b’wiċċ ta’ qatgħa rettangulari (inkluż kwadru), triangolari ekwilaterali jew poligonali konvessi regolari, li jistgħu jkollhom il-kantunieri ttundjati matulhom kollu, għandhom ukoll jitqiesu li huma tubi u pajpijiet sakemm l-uċuħ ta’ qatgħa ta’ ġewwa u ta’ barra huma konċentriċi u għandhom l-istess għamla u orjentazzjoni.
products with a rectangular (including square), equilateral triangular or regular convex polygonal cross-section, which may have corners rounded along their whole length, are also to be considered as tubes and pipes provided the inner and outer cross-sections are concentric and have the same form and orientation.