《雪铁龙汽车公司成本节流堵漏手册(英文版)》(79页).rar THE　ENGINEERED　LOST　CIRCULATION　MATERIALS　OF DRILLING　SPECIALTIES　COMPANY OVERVIEW Over　the　last　63　plus　years　Drilling　Specialties　Company　has　introduced　a　variety　of　unique　LCM＇s　(lost　circulation　materials)　designed　to　meet　specific　needs　of　the　drilling　industry.　Now　a　big　part　of　our　business　these　products　address　short　falls　in　the　drilling　fluids　industries　line　up　of　materials　used　to　remedy　or　prevent　lost　circulation. ENGINEERED　VS　YARD　CLIPPINGS..........