CB Radio channel- which is a hole between the channel

Surely anyone met the definition channel between holes, or 10 holes or eleventh hole, or fifteenth hole during the information disappear suddenly. Of course, most CB radios, knows what we talk about, but in my opinion, it should be even explain. As I mentioned at frequencies in our country force us zero raster, ie the interval between channels notice 10kHz. Here is an example: the first channel frequency is 26.960 MHz which gives us 26960kHz, while the second channel frequency, of 26.970 MHz, which is 26970 kHz, which gives us the distance between the channels, amounting to 0,010MHz, or 10kHz. According to calculations, 40 channels have been allowed in our country, simple analysis gives so in terms of 26,960-27,400MHz exactly 0,44MHz, a total of 440kHz. Probably many wonder why the interval 10kHz, by multiplying FOR IN number of channels, we get 440 kHz. The blame for this bear just mentioned holes between the channel, in the case of channels 3 and 4, 7 and 8, 11 and 12, or 15 and 16,