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根据电极丝的运行速度,电火花线切割机床通常分为电火花线切割和电火花线切割两大类。

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【单选题】Under FOB, the seller may accept the buyer's entrustment to book shipping space on behalf of the buyer at the buyer's expense. However, there is the risk that the seller may not be able to book shipping space before the stipulated date of shipment, then _____.

A. The seller is not liable for the risks; the buyer is liable for the risks.
B. The buyer is liable for the risks; the seller is liable for the risks.
C. Buyers and sellers jointly assume responsibility and risk
D. Neither parties assume responsibility and risk, and the contract terminates.

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根据电极丝的运行速度,电火花线切割机床通常分为电火花线切割和电火花线切割两大类。

线切割加工的主要工艺指标是、和。

快走丝线切割机床刚开始加工阶段断丝的原因是、钼丝抖动厉害、。

快走丝线切割机床加工最后阶段断丝的原因是、。

【单选题】Under FOB, the seller may accept the buyer's entrustment to book shipping space on behalf of the buyer at the buyer's expense. However, there is the risk that the seller may not be able to book shipping space before the stipulated date of shipment, then _____.