daim ntawv thov
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Cov ntaub ntawv siv rooj tog
Kev pab txav ua rau nws yooj yim dua thiab nyab xeeb los kho cov rooj tog, txo qis ... -
Railway
Peb cov khoom ua rau tsheb ciav hlau taug kev yooj yim dua los ntawm damping shocks thiab ... -
Marine (Nkoj Lub Tsev)
Yooj yim qhib, ruaj ntseg tuav, thiab damped kaw ntawm hatches thiab bunks m ... -
Tsheb thauj mus los thiab tsheb
Kev pab qhib thiab kaw ntawm cov khoom siv sab nrauv ua rau ya nyab xeeb ...
