Hold the colorful acus s cover in one hand.Let the port of the bi-direction be exposcd.Screw thc port into the holder.The colorfulacus s cover will protect the forwcrd part ofthc bi-direction from bacteria s pollution.

• 一手握住双向针的彩色针套，另一手逆时针方向拧下白色针套，暴露双向针的刺塞端（带弹性胶套的一端）；将双向针刺塞端按顺时针方向拧入持针器中，彩色针套仍保护双向针前端，避免细菌污染。