Swiper 官网例子中用的MD-CARD是什么

Question

究竟是个什么？给个关键词

<template>

  <md-card>

    <md-card-actions>

      <div class="md-subhead">

        <span>Default</span>

        <span>（</span>

        <span>默认设置</span>

        <span>）</span>

      </div>

      <md-button class="md-icon-button"

                 target="_blank"

                 href="https://github.com/surmon-china/vue-awesome-swiper/blob/master/examples/01-default.vue">

        <md-icon>code</md-icon>

      </md-button>

    </md-card-actions>

    <md-card-media>

      <!-- swiper -->

      <swiper>

        <swiper-slide>Slide 1</swiper-slide>

        <swiper-slide>Slide 2</swiper-slide>

        <swiper-slide>Slide 3</swiper-slide>

        <swiper-slide>Slide 4</swiper-slide>

        <swiper-slide>Slide 5</swiper-slide>

        <swiper-slide>Slide 6</swiper-slide>

        <swiper-slide>Slide 7</swiper-slide>

        <swiper-slide>Slide 8</swiper-slide>

        <swiper-slide>Slide 9</swiper-slide>

        <swiper-slide>Slide 10</swiper-slide>

      </swiper>

    </md-card-media>

  </md-card>

</template>