2.1.1 elements of the phone.(1) machine consists of circuit board (with precious metals and various kinds of dangerous substances, including copper, gold, arsenic, antimony beryllium weave refractory made of bromine Cadmium, lead, nickel, palladium, silver, tantalum, and zinc) liquid crystal display (LCD) (components of liquid crystals are of various kinds and levels of the different hazards). The speaker and microphone. (is very small, but it contains heavy metals). The mask or the wrapping of the phone. (made of plastic, a polycarbonate or ABS, or a mixture of two substances) แผ่นปุ่ม press and source signals.(2) inverter voltage to charge the battery. Found is the main ingredient is a copper wire with plastic, and other components. In little; gold, cadmium, and fireproof.(3) energy sources / battery. This is generally a capacitor that can be compressed, which are new type nickel-cadmium (Ni-Cd) type nickel - iron (Ni-Fe) and type nickel-metal hydride (Ni-MH) until the current version, which use battery lithium - ion (Li-ion) which can charge for over And can charge the fire. But in some models also have a high price.
การแปล กรุณารอสักครู่..