# Page Not Found

The URL `a-class-options` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [A 量測相關設定](https://docs.lorric.com/qr/fu-es-ultrasonic-flowmeter-manual-chinese-v1/parameters/a-class-options.md)
- [Z 快速設定](https://docs.lorric.com/qr/fu-es-ultrasonic-flowmeter-manual-chinese-v1/parameters/z-class-options.md)
- [B 單位相關設定](https://docs.lorric.com/qr/fu-es-ultrasonic-flowmeter-manual-chinese-v1/parameters/b-class-options.md)
- [C 累計相關設定](https://docs.lorric.com/qr/fu-es-ultrasonic-flowmeter-manual-chinese-v1/parameters/c-class-options.md)
- [量測原理及設計使用情景](https://docs.lorric.com/qr/fu-es-ultrasonic-flowmeter-manual-chinese-v1/measure-principles-and-applications.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://docs.lorric.com/qr/fu-es-ultrasonic-flowmeter-manual-chinese-v1/parameters/a-class-options.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://docs.lorric.com/qr/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://docs.lorric.com/qr/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/qr/fu-es-ultrasonic-flowmeter-manual-chinese-v1/parameters/a-class-options.md`).

You may also use `Accept: text/markdown` header for content negotiation.