Name various fixed points used in thermometry.

Explanation

To answer the question about the various fixed points used in thermometry, we can outline the following steps:

### Step-by-Step Solution:

1. **Identify Fixed Points**: Understand that fixed points in thermometry are specific temperatures at which certain phases of a substance are in equilibrium. These points are used as reference standards for temperature measurement.

2. **List the Fixed Points**:
- **Oxygen Point**: This is the temperature at which liquid oxygen and gaseous oxygen are in equilibrium. The value is approximately **-182.97°C**.
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