The tubular backbone is the main loading member of motorcycle frame, which needs reliable strength calculation when designing.
摩托车车架主管是摩托车的主要承载构件，设计时要进行可靠的强度计算。
The tubular backbone is the main loading member of motorcycle frame, which needs reliable strength calculation when designing.
摩托车车架主管是摩托车的主要承载构件，设计时要进行可靠的强度计算。
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