[国外标准] SAE J999-1998 Crane Boom Hoist Disengaging Device
[国外标准] SAE J1180-1980 TELESCOPIC BOOM LENGTH INDICATING SYSTEM
[国外标准] SAE J1063-1993 CANTILEVERED BOOM CRANE STRUCTURES.METHOD OF TEST
[国外标准] JIS F2211-1998 Derrick boom headfittings－Fixed type
[国外标准] JIS F2210-1998 Derrick boom heel fittings－Main dimensions
[国外标准] JIS F2205-1987 Boom Rest Head Pieces