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重庆煤炭科学研究所矿井地质研究室继研制出用于探测采煤工作面内地质小构结的WKT-J_1型、WKT-J_2型坑透仪后,又于最近研制成功了WKT-F型(安全火花型防爆)坑透仪。
Following the development of the WKT-J_1 and WKT-J_2 pit-penetrating meters for detecting the small geological formations in the coal mining face, the coal mine geological research laboratory of Chongqing Coal Science Research Institute succeeded in developing the WKT-F type Safety spark-proof) Pit through the instrument.