Corona Pen
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Corroform
Ostiraliya IDM, kayan aikin Ostiraliya IDM ce ta ƙera ta kuma kera ta, galibi ana amfani da ita don gwada ninke takarda, da kayan aikin sadaukarwa. -
Corona alkalami
Daban-daban tensiles irin su British Schuman, Birtaniya gida 38, 40, 42, 44, 46, 48, 50 iya gwada daidai ko surface tashin hankali na filastik fim ya kai darajar gwajin alkalami. Bari mai amfani ya fahimci wannan fim ko ya dace da bugawa.
