Qaab-dhismeedka birta waa nooc ka mid ah qaab dhismeedka dhismaha inta badan ka samaysan taarikada birta, qaybaha birta, tuubooyinka birta, fiilooyinka birta ah iyo waxyaabaha kale ee bir ah, kuwaas oo ku xidhan welds, bolts ama rivets. Marka la barbar dhigo foomamka dhismayaasha kale sida la xoojiyey qaab dhismeedka la taaban karo, musiino iyo qaab dhismeedka kale, qaab dhismeedka iftiinka leh, oo ku habboon qaab-dhismeedka habaynta, iyo heerka sare ee warshadeynta, waqtiga dhismaha.
Marka laga eego aragtida tirada shirkadaha, 2019 Soosaarka sanadlaha ah ee Shiinaha in ka badan 1 milyan oo tan oo shirkado ah ayaa leh 4, 100-500,000 oo shirkado shirkadeed ah 33, oo ka badan shirkadaha waaweyn iyo kuwa dhexdhexaadka ah ee warshadaha.
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