校准链 meaning in English

calibrated chain
pitch chain
tested chain

Mining equipment . shackles for calibrated chains en scrayer conveyors . specifications . acceptance conditions
采煤设备.链节输送机校准链连接环.验收条件
Mining equipment . round link type chain universel connectors for calibrated chains . specifications . acceptance testing
采煤设备.经通用连接链环用圆钢丝校准链
Mining equipment . high tensile steel chains round link for chain conveyors and coal plough . specifications . acceptance testing
采煤设备.经链板输送机用高抗拉强度圆钢丝链环的校准链.规范.验收条件