機器
30 35
attention
attentive
background
blade
bracket
brim
careful
caucasian
concentrate
concentrating
concentration
cut
cutting
difficulty
electric
face
focus
focused
focusing
frown
frowning
handheld
hard
hat
head
helmet
isolated
jigsaw
lumber
machinery
man
mechanical
operate
operating
power
problem
safety
saw
sawing
thin
timber
tool
tradesman
tradesperson
trouble
white
wood
woodworking
workman
years
yellow