英文關鍵字
machinery
laboratory
motion
studying
student
study
technology
footage
board
teacher
blank
labor
mom
boy
mother
lesson
school
training
students
gift
project
slicing
cutting
products
mentor
wood
helps
make
plywood
diy
grandmother
pupil
tool
wooden
work
closeup
equipment
hand
man
professional
manual
jigsaw
machine
carpenter
woodwork
male
sawing
electric
cuts
for
bread
from