, , , . ., . . [2, 3, 4, 7, 8,22,30].
●
, . () H, : H = π D ctgω p, ω ( 2.1). :
(2.1)
xyz, , z , BC xOy ( 2.1). BC : r δ; ξ - - OA , - ; ρ .
:
δ, OA x ; ξ, OA ( ); ρ, OA .
2.1
( ), , , . , , ( 2.2). .
2.2
●
, , . . .
. ( 2.3), , , . , , , .
2.3
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