A na-eji ụgbọ ala triangular crawler eme ihe n'ọtụtụ ebe, ọkachasị na akụrụngwa akụrụngwa nke kwesịrị ịrụ ọrụ na mbara ala dị mgbagwoju anya na gburugburu ebe siri ike, ebe ejiri uru ya zuru oke. Ebe a bụ ụfọdụ ebe ngwa ngwa: igwe ọrụ ugbo: Triangular track under carriages bụ sara mbara...
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