Water fire extinguisher
Foam fire extinguisher
Wet chemical fire extinguisher
Carbon dioxide fire extinguisher
foundation bolt
fastening bolt
power transmission bolt
locking of bolt
(Pie x d)/2t
(Pie x d) / t
(2 x Pie x d)/t
(Pie x d)/3t
Knurling
spinning
trepanning
grinding
equal acetylene and oxygen
more hydrogen and less oxygen
less acetylene and more oxygen
more acetylene and less oxygen