Mtengo wa NS1942

Magolovesi oteteza chitetezo osamva mafuta amagwiritsidwa ntchito kuteteza khungu la manja kuti lisakwiyitsidwe ndi zinthu zamafuta, zomwe zingayambitse zizindikiro zosiyanasiyana. Kuphatikiza apo, iwo ndi odana ndi kuterera komanso okhazikika. Nthawi zambiri amapangidwa ndi zinthu monga mphira wa nitrile ndipo amakhala olimba kwambiri. Kusinthasintha ndi kukhudzika, zomwe zimagwiritsidwa ntchito makamaka poyenga petrochemical ndi petroleum ndi ntchito zokhudzana ndi malo okhala ndi mafuta, ndipo zimakhala ndi ntchito zosiyanasiyana.