class

<iframe width="450" height="260" style="border: 1px solid #cccccc;" src="https://thingspeak.com/channels/1014563/charts/1?bgcolor=%23ffffff&color=%23d62020&dynamic=true&results=60&title=%E6%B8%A9%E5%BA%A6&type=line&xaxis=%E6%97%B6%E9%97%B4&yaxis=%E6%91%84%E6%B0%8F%E5%BA%A6"></iframe>

<iframe width="450" height="260" style="border: 1px solid #cccccc;" src="https://thingspeak.com/channels/1014563/charts/2?bgcolor=%23ffffff&color=%23d62020&dynamic=true&results=60&title=%E6%B9%BF%E5%BA%A6&type=line&xaxis=%E6%97%B6%E9%97%B4&yaxis=%E6%B9%BF%E5%BA%A6"></iframe>

<iframe width="450" height="260" style="border: 1px solid #cccccc;" src="https://thingspeak.com/channels/1014563/charts/3?bgcolor=%23ffffff&color=%23d62020&dynamic=true&results=60&title=%E4%BA%BA%E6%95%B0&type=line&xaxis=%E6%97%B6%E9%97%B4&yaxis=%E6%80%BB%E4%BA%BA%E6%95%B0"></iframe>