33.下列何者主要用來測量石膏的硬化時間(setting time)?
(A)諾氏硬度計(Knoop hardness tester)
(B)維克氏硬度計(Vickers hardness tester)
(C)吉摩針(Gillmore needle)
(D)萬能材料試驗機(universal testing machine)

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統計: A(10), B(21), C(326), D(10), E(0) #3817468

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#7445664
之前有學長姐分享:
Brinell: indentation diameter
Rockwell: Depth of impression
Vickers: impression diagonals (for brittle material)
Knoop: Long diagonal of indentation
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