DCA and QLB digital currency
1. The appearance colors of the two hand drills are different. The appearance color of Dongcheng electric hand drill is blue, and that of DCA electric hand drill is green
There is a difference in the price between the two electric hand drills. 
2. Dongcheng electric hand drill is more expensive than DCA electric hand drill, and DCA electric hand drill is cheaper
3, the two kinds of electric hand drills are different in the market. Dongcheng series of electric hand drill tools mainly face the domestic electric hand drill Market. DCA series of electric hand drill tools are mainly exported to foreign markets for sale. The market positioning of the two kinds of electric hand drill tools is different
The main components of Dongcheng electric hand drill are drill chuck, output shaft, gear, rotor, stator, casing, switch and cable. Electric hand drill (pistol drill) is a tool for drilling metal materials, wood, plastics, etc. When equipped with forward and reverse switch and electronic speed regulating device, it can be used as an electric screwdriver. Some models are equipped with rechargeable batteries, which can work normally without external power supply within a certain period of time reg51.h > < br/>sbitP10=P1^0;< br/>voidmain()
{EA=1; ET1 is 1; TR0=1; < br/>TMOD=01;< br/>TH0=65536-2000/256; < br/>TL0=65536-2000%256;<
while(1)
{
P10=~P10;
br/>}
}
voidNT1()interrupt3
{
TH0=65536-2000/256;
br/>TL0=65536-2000%256;< br/>}
The following procere is 38191 in three wave three wavelengths proced by 0832; wave wave wave
#include < AT89X51.H > < br/>#include < absacc.h> < br/>#definePPXBYTE[0x7fff]
#defineuintunsignedint
uinti,j,k;< br/>voiddelay(uintz);< br/>voidmain()
{
while(1)
{
if (P1_0==0)
{delay(10);
br/> (P1_0==0)
{while(P1_2!= 0&" amp; P1_1!= 0)
{P1_3=0;< br/>for(i=255; i >= 0;
{PP=i;}< br/>while (P1_0!= < br/>}
if(P1_1==0)
{delay(10);< br/> (P1_1==0)
{P1_4=0;< br/>while (P1_0!= 0&" amp; P1_2!= 0)
{for(j=0; j <= 254; j++)
{PP=j;}< br/>for(j=255; j >= 0; j-)
{PP=j;}< br/>}
while (P1_1!= 1)}<
{delay(10);< br/> (P1_2==0)
{while(P1_0!= 0&" amp; P1_1!= 0)
{P1_5=0;< br/>PP=255;< < br/>PP=0;< Delay(10);}}< br/>}
voiddelay(uintz)
{uintx,y;
for(y=120; y> 0; y-);<
air conditioning is a process of adjusting and controlling the temperature, humidity, cleanliness, speed and other parameters of the ambient air in buildings / structures by manual means. It generally includes cold source / heat source equipment, cold and hot medium transmission and distribution system, terminal device and other auxiliary equipment. It mainly includes water pump, fan and pipeline system. The terminal device is responsible for using the cold and heat to deal with the air to make the air parameters of the target environment meet the requirements.
Σall of the people in the world, and the \\\\\\\\\\\it's not easy
Dongcheng focuses on the domestic market, and DCA mainly exports to foreign markets! The two brands are made by two brothers, and the quality of things is the same
∵ in triangle ABC, ∠ DAC = 40 °， ∠DCA=20 °，< br />∴∠ADC=120 °
and ∵ ∠ ADC is the outer angle of triangle BDC,
∵ ADC = ∵ DBC + ∵ DCB
∵ DBC = 70 °
impossible!! Is it the wrong way to do this without that