ruler. Hand-painted ruler ,inch and cm for the unit , is identified by the middle of the two red line to measure the width of the articles. （手绘直尺，以inch和cm为单位的，可以通过中间的两条红线来确认要测量物品的宽度）

Problem

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.

Audience

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.

Market

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.

Pricing

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.