Ụdị ihe eji eme ihe eji eje ije crawler ụlọ ọrụ anyị na-emepụta ihe akụrụngwa chassis nke excavator, dị ka: rollers, na-akwado rollers, egwu, ndị na-adịghị arụ ọrụ, mgbanaka rụrụ arụ, obere rollers, sprockets, ígwè ígwè, elu rollers, track chains, track group, track chains. egwu akpụkpọ ụkwụ, rollers, track...
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