Subsequently, molten (L1) is introduced to the inner circumferential wall side of the outer tubular body (14) while sustaining rotation of the tubular die (22) thus forming an inner tubular body (12).

随后，在筒状模具(22)持续旋转的同时，将熔体(L1)引到所述外筒状体(14)的内周壁侧，从而形成内筒状体(12)。

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Great river song "turn east, abstruse and full of poor families and helpful. The wall, side wall decade figure resentment and dived hero."

大江歌罢掉头东，邃密群科济世穷。面壁十年图破壁，难酬蹈海亦英雄。

youdao

Great river song "turn east, abstruse and full of poor families and helpful. The wall, side wall decade figure resentment and dived hero."

大江歌罢掉头东，邃密群科济世穷。面壁十年图破壁，难酬蹈海亦英雄。

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