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