The insulating substances comprise 0.003 2.83 wt % PbO, 0.10 4.30 wt % Bi2 O3, and {HEAD ~ 0.001 0.18 wt % B2 O3} with {TAIL ~ respect} to the total weight of the primary and the secondary ingredients 
The insulating substances comprise 0.003 2.83 wt % PbO , 0.10 4.30 wt % Bi2 O3 , and { HEAD ~ 0.001 0.18 wt % B2 O3 } with { TAIL ~ respect } to the total weight of the primary and the secondary ingredients
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH