Tafuta ' ' kupata maudhui yanayofaa , ambayo inachukua sekunde }
Neno halijajumuishwa kwenye tovuti hii 'CeadarLungachuma 22 isiyo na makofi', unakaribishwa kuunda :)
Muhtasari: it can be divided into oil well pipe (casingAccording to the purpose, oil pipe and drill pipe), pipeline pipe, boiler p[Soma maandishi yote]