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双滑轮 | |
auto. | sister block |
construct. | sister block |
ecol. | sister block |
合成弓 | |
archer. | compound bow; composite bow |
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sister block | |||
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sister block | |||
sister hooks | |||
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sister block |
双滑轮: 22 phrases in 6 subjects |
Animal husbandry | 1 |
Archery | 1 |
Figure skating | 1 |
Metallurgy | 2 |
Oil / petroleum | 1 |
Technology | 16 |