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load carrier (grip (use of hook to hold the sack (making hole in the sack)…
load carrier
amount of weight
material been unloaded
health
different highests from where the sack is been loaded
different vicheles
load on which part of the body
anthropometry
on back
using the hook
holding the sack by hands
over the head
on one shoulder
distance travelled with the load
maximum and minimum weight of the sack
different dimensions
frequency
grip
no proper hold over the back
angle
use of hook to hold the sack
making hole in the sack
ergonomics
existing hacks
different material of sack
jute
nylon