Home / Standards / GB 7121-1986 GB 7121-1986 Abolished Agricultural and forestrywheeled tractors--Protective structures--Test method in the strength and acceptance conditions 农林轮式拖拉机防护装置强度试验方法和验收条件 Standard Type GB ICS 65.060.10 CCS T60 Status 废止 Issue Date 1986-12-30 Implementation 1987-09-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会