用螺栓紧固的隔爆面，螺栓、弹簧垫圈必须齐全和紧固，紧固程度以将垫圈压平为（）；弹簧垫圈、平垫的规格须与螺栓相适应；螺栓和螺孔不能滑扣；同一部位螺栓、螺母规格应一致，钢紧固螺栓拧入螺母的深度不能小于螺栓直径；电动机接线盒盖不得上反，否则为（）。

A. 直销渠道
B. 实体渠道
C. 电子渠道
D. 社会渠道

A. Transaction management is block-oriented rather than window-oriented.
B. Forms automatically navigates to an item located in an activated window.
C. A window may contain multiple blocks, but each block can only span one window.
D. A window can contain multiple canvases, and an item can be located on multiple canvases.&e