class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"

Trích đoạn khoảng 30ml nước cất dùng đũa thuỷ tỉnh khuấy tan cho vào bình định mức

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