crew safety and security course

lahat ng mano mano push pull etc.jQuery11240895664561191359_1534256800551?

pag mabigat binuhat anu sakit?
panu prevent?

vibration comes from the use of hand held power tools or other vibrating equipment?
ex. of these equipment?
ex. of sakit?

occurs through shaking or jolting of the body through a supporting surface. ex using mobile equip incorrect posture