معنى البيريليوم عنصر فلزي في القاموس

HALIDES AND HALIDE OXIDES OF NON-METALS

Containing by weight antimony as the principal other element

SULPHIDES OF NON-METALS; COMMERCIAL PHOSPHORUS TRISULPHIDE

Goods, as follows (a) connection and contact elements for wires and cables; (b) wafer probers

Switch blades, crossing frogs, point rods and other crossing pieces