derrick block

短语词组

短语

• derrick head block 吊杆头滑车
• derrick heel block 吊杆底导向滑车;吊杆座滑车
• derrick k block 提升滑轮
• derrick head span block 吊杆头跨绳滑车
• derrick head purchase block 上吊货滑车
• derrick cargo lead block 吊货索导向滑车
• derrick head cargo block 吊杆头起货滑车;吊杆头起重滑车;上吊货滑车
• derrick head shipment block 吊杆头起货滑车
• cargo derrick heel lead block 吊货杆座导索滑车
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