第二版取消并取代第一版（1981年）。指定设备的工作宽度，作为这些机器的制造商和用户的指南。在播种和种植机器（第一次操作）和后续操作机器之间建立一个集合。将建议的工作宽度制成表格。

This second edition cancels and replaces the first edition (1981). Specifies the working widths for equipment as a guideline for the manufacturers and users of these machines. Establishes a comllementary between the machines for sowing and planting (first operation) and the machines for subsequent operation. Tabulates the recommended working widths.