ān / zhuāng / zhī / chéng / xiāo / shí / bì / xū / xiān / jiǎn / chá / xiāo / kǒng / shì / fǒu / duì / qí安装支承销时,必须先检查销孔是否对齐。When installing the fulcrum pin, you must first check whether the pinholes are aligned.