pr??L??mr??r3p???L??mr2sin2?????p???L2??mr????22p1?p?2?pr??????H??L??p?q2222m?rrsin?i?1????V?r,?,??????r?Hp?r?prm?r??p?H?V???r?r
?Hp?????22p?cos??H?V????p???23?p?mr????Hp??p??mr2sin2???mrsin?p??H????????V????
pr??L??mr??r3p???L??mr2sin2?????p???L2??mr????22p1?p?2?pr??????H??L??p?q2222m?rrsin?i?1????V?r,?,??????r?Hp?r?prm?r??p?H?V???r?r
?Hp?????22p?cos??H?V????p???23?p?mr????Hp??p??mr2sin2???mrsin?p??H????????V????