1·Such problems in accessary welding as insufficient weld depth and length, and poor visual quality will cause future safety problems.
一些附件焊高不够、焊缝长度不足及焊缝外观质量差等施工安装问题，都会对安全生产留有后患。
2·The connecting device is used to connect the hair nursing accessary and the corresponding handle, the handle is provided with a heating device and a blowing device.
所述的连接装置用于把所述的头发护理附件与所述的对应的手柄相连接，所述的手柄设有加热装置和吹气装置。
1·This kind of previous job is accessary .
这种事先的准备工作是附带进行的。