英文關鍵字
abrasive
accuracy
automate
batch
blur
buff
coolant
corundum
cut
cylindrical
detail
diameter
diamond
disc
disk
equipment
flat
foundry
grinder
grinding
grindstone
industrial
industry
iron
machine
machinery
machining
manufacturing
metal
metalworking
operation
plant
polish
precision
process
production
rotation
roughness
sparkles
sparks
speed
steel
stone
strength
surface
tool
water
wet
wheel
workshop