Note:
(a) "陸軍現有主力戰車近1200輛，其中美製 [壽期已達30年] 的M60A3有460輛"
(i) M60 Patton has four versions: M60 (Wiki calls this "initial versions"), A1, A2 and A3.
(ii) "M60 tanks entered service with the US Army in 1960. * * * the highly successful M60A3, which incorporated improvements to the gun fire control and entered service in 1978. * * * The US Army phased M60A3 out of service in 1997 and it was superseded by M1 Abrams, a third generation main battle tank."
M60A3 Main Battle Tank, United States of America. army-technology.com, undated. http://www.army-technology.com/projects/m60/
(iii) There is no Chinese name for M60A3 in Taiwan, where "M60A3" is used.
(b) "美軍二手M1A1有機會獲得，並進入談判採購階段，不過後來我方評估A1型無法滿足作戰需求，決定放棄採購，轉而直攻爭取性能更強的M1A2，經「陸威」等台美多項軍售會議談判，近期已獲美方初步同意。"
(i) M1 Abrams https://en.wikipedia.org/wiki/M1_Abrams
(The M1 Abrams entered U.S. service in 1980, replacing the M60 tank; Three main versions of the M1 Abrams have been deployed, the M1, M1A1, and M1A2; named after General Creighton Abrams; The M1A1 was capable of making kills at ranges in excess of 2,500 metres (8,200 ft); The M1A2 was a further improvement of the M1A1)
(ii) For 陸威, I can only find the following:
(c) "美製M1A2戰車裝配120mm口徑的M256滑膛炮"
(i)
(A) M1A1/2 Abrams Main Battle Tank, United States of America. army-technology.com, undated. http://www.army-technology.com/projects/abrams/
(M1A2 first produced in 1986; fewer produced than M1A2; The main armament [of M1 Abrams] is the 120mm M256 smoothbore gun, developed by Rheinmetall Waffe Munition GmbH of Germany)
(B) smoothbore https://en.wikipedia.org/wiki/Smoothbore
(section 2 Modern smoothbores)
(2) 吳明杰, 獨家》「擊穿共軍新一代戰車裝甲」 戰車國造啟動技術評估. 風傳媒, Oct 17, 2016. http://www.storm.mg/article/178144
("以共軍99式戰車為例，砲塔正面的防護鋼板就達700mm，車體其他防護鋼板也有500至600mm")