Yog, pneumatic tus ntsia hlau phom yog rab phom ntsia hlau rau cov ntsia hlau, feem ntau yog siv rau kev kho kom zoo nkauj sab hauv, pob zeb, ntoo lossis hlau phaj.
Cov ntsia hlau steel ntsia hlau yog siv los kho ntau cov xyoob ntoo, ntoo thiab lwm yam khoom muag muag lossis cov ntawv tawv ntawm cov phab ntsa-pob zeb ua vaj tse thiab pob zeb ua vaj tse. Kev sib txuas thiab kev kho ntawm cov hlau tsis tshua muaj kab lossis polymer.
