TY JOUR TI Dual-circuit trenching depth control systems KW dual-loop control systems KW drain laying machine KW laser transmitter KW receiver KW control panel KW electro-hydraulic unit KW working body KW drain laying accuracy KW satellite navigation control systems JO Melioration and Water Management AU Efremov, A.N. PY 2026 IS 2025 PB ANO Editorial Board Melioration and water management