Explanation of some words:
I. Definition of pin:
1, melting metal.
2. take it out; lift
Second, the explanation of the needle:
1, a tool for sewing clothes, slender and compact, with a pointed end, a hole or a hook, which can be drawn, and is mostly made of metal.
2. Something as slender as a needle.
Third, the definition of electroplating:
By electrolysis or other chemical methods, a metal is uniformly attached to the surface of other metals or objects to form a thin layer.
Fourth, the definition of aluminum:
Metal element, symbol al, atomic number 13. Silver white, easy to extend, tough and light, good electrical and thermal conductivity. Aluminum is used for wires and cables, and aluminum alloy is used to make airplanes, rockets, doors and windows, daily utensils and so on.
Definition of verb (verb) saw:
1. Tools for pulling (lá) wood, stone and steel are mainly thin steel sheets with many sharp teeth on them.
2. Pull (lá) with a saw.
Extended data
Related words:
1, best-selling [chàng xiāo]?
(Commodities) have a wide market and sell quickly.
2. For [[[zhn duì]?
Aim.
3. Titanium plating [Dü tà i]?
In high temperature and vacuum titanium furnace, titanium and zirconium metals.
4. aluminum?
Coat the outer layer of an object with gold and make it smooth. Rudder, through the "application"; Aluminum, the same as "Xi".
5. hand saw [shǒu j?]?
Move the arm-driven saw back and forth with one hand.